Từ vựng bắt đầu bằng chữ O
o'clock/əˈklɑk/
according to the clock
object/ˈɑbdʒɛkt/
a tangible and visible entity; an entity that can cast a shadow
objective/əbˈdʒɛktɪv/
the goal intended to be attained (and which is believed to be attainable)
obligate/ˈɑbləˌɡeɪt/
force somebody to do something
obligation/ˌɑːblɪˈɡeɪʃn/
the social force that binds you to the courses of action demanded by that force; ; - John D.Rockefeller Jr
oblige/əˈblaɪdʒ/
force somebody to do something
observation/ˌɑbzɚˈveɪʃən/
the act of making and recording a measurement
observe/əbˈzɜːrv/
discover or determine the existence, presence, or fact of
obtain/əbˈteɪn/
come into possession of
obvious/ˈɑbviəs/
easily perceived by the senses or grasped by the mind
obviously/ˈɑbviəsli/
unmistakably (`plain' is often used informally for `plainly')
occasion/əˈkeɪʒən/
an event that occurs at a critical time
occasionally/əˈkeɪʒənəli/
now and then or here and there
occupancy/ˈɑːkjəpənsi/
an act of being a tenant or occupant
occupant/ˈɑkjəpənt/
someone who lives at a particular place for a prolonged period or who was born there
occupation/ˌɑkjəˈpeɪʃən/
the principal activity in your life that you do to earn money
occupy/ˈɑkjəˌpaɪ/
keep busy with
occur/əˈkɝ/
come to pass
occurrence/əˈkɝəns/
an event that happens
ocean/ˈoʊʃən/
a large body of water constituting a principal part of the hydrosphere
odd/ɑd/
not divisible by two
of/ʌv/
the quality, condition, or instance of of
off/ɔf/
from a particular thing or place or position (`forth' is obsolete)
offense/əˈfɛns/
a lack of politeness; a failure to show regard for others; wounding the feelings or others
offer/ˈɔfɚ/
make available or accessible, provide or furnish
office/ˈɑːfɪs/
place of business where professional or clerical duties are performed
officer/ˈɔfəsɚ/
any person in the armed services who holds a position of authority or command
official/əˈfɪʃəl/
having official authority or sanction
officially/əˈfɪʃəli/
in an official role
often/ˈɔfən/
many times at short intervals
oil/ɔɪl/
a slippery or viscous liquid or liquefiable substance not miscible with water
okay/ˌoʊˈkeɪ/
an endorsement
old/oʊld/
(used especially of persons) having lived for a relatively long time or attained a specific age
omit/oʊˈmɪt/
prevent from being included or considered or accepted
on/ɑn/
in operation or operational
once/wʌns/
on one occasion
one/wʌn/
the smallest whole number or a numeral representing this number
ongoing/ˈɑnˌɡoʊɪŋ/
currently happening
online/ˈɔnˌlaɪn/
on a regular route of a railroad or bus or airline system
only/ˈoʊnli/
and nothing more
onto/ˈɑntu/
the quality, condition, or instance of onto
open/ˈoʊpən/
cause to open or to become open
opera/ˈɑprə/
a drama set to music; consists of singing with orchestral accompaniment and an orchestral overture and interludes
operate/ˈɑpɚˌeɪt/
direct or control; projects, businesses, etc
operation/ˌɑpɚˈeɪʃən/
the state of being in effect or being operative
operational/ˌɑpɚˈeɪʃənəl/
pertaining to a process or series of actions for achieving a result
operator/ˈɑpɚˌeɪtɚ/
(mathematics) a symbol or function representing a mathematical operation
opinion/əˈpɪnjən/
a personal belief or judgment that is not founded on proof or certainty
opponent/əˈpoʊnənt/
a contestant that you are matched against
opportunity/ˌɑpɚˈtunəti/
a possibility due to a favorable combination of circumstances
oppose/əˈpoʊz/
be against; express opposition to
opposite/ˈɑpəzət/
being directly across from each other; facing; - Longfellow
opposition/ˌɑpəˈzɪʃən/
the action of opposing something that you disapprove or disagree with
opt/ɑpt/
select as an alternative over another
optimistic/ˌɑptəˈmɪstɪk/
expecting the best in this best of all possible worlds
option/ˈɑpʃən/
the right to buy or sell property at an agreed price; the right is purchased and if it is not exercised by a stated date the money is forfeited
optional/ˈɑpʃənəl/
possible but not necessary; left to personal choice
or/ɔr/
a state in northwestern United States on the Pacific
orange/ˈɔrəndʒ/
a round citrus fruit with a tough bright reddish-yellow rind; the color of an orange
orchestra/ˈɔrkəstrə/
a musical organization consisting of a group of instrumentalists including string players
order/ˈɔːrdər/
a request to supply goods or services; to place a purchase request
ordinary/ˈɔrdəˌnɛri/
not exceptional in any way especially in quality or ability or size or degree
organic/ɔrˈɡænɪk/
relating or belonging to the class of chemical compounds having a carbon basis
organization/ˌɔrɡənəˈzeɪʃən/
a group of people who work together
organizational/ˌɔrɡənəˈzeɪʃənəl/
of or relating to an organization
organize/ˈɔrɡəˌnaɪz/
create (as an entity)
organizer/ˈɔrɡəˌnaɪzɚ/
a person who brings order and organization to an enterprise
orientation/ˌɔriɛnˈteɪʃən/
the act of orienting
origin/ˈɔrədʒən/
the place where something begins, where it springs into being
original/ɚˈɪdʒənəl/
preceding all others in time or being as first made or performed
originally/ɚˈɪdʒənəli/
in an original manner
other/ˈʌðɚ/
not the same one or ones already mentioned or implied; - the White Queen
otherwise/ˈʌðɚˌwaɪz/
in other respects or ways
ought/ɔt/
the quality, condition, or instance of ought
ourselves/aʊɚˈsɛlvz/
the quality, condition, or instance of ourselves
out/aʊt/
away from home
outage/ˈaʊtədʒ/
the amount of something (as whiskey or oil) lost in storage or transportation
outcome/ˈaʊtˌkʌm/
something that results
outdated/ˈaʊtˌdeɪtɪd/
old; no longer valid or fashionable
outdoor/ˈaʊtˌdɔr/
located, suited for, or taking place in the open air
outdoor cafe/ˈaʊtdɔːr kæˈfeɪ/
the quality, condition, or instance of outdoor cafe
outfit/ˈaʊtˌfɪt/
any cohesive unit such as a military company
outlet/ˈaʊtˌlɛt/
a place of business for retailing goods
outline/ˈaʊtˌlaɪn/
the line that appears to bound an object
outlook/ˈaʊtˌlʊk/
a habitual or characteristic mental attitude that determines how you will interpret and respond to situations
output/ˈaʊtpʊt/
final product; the things produced
outreach/ˈaʊtriːtʃ/
the act of reaching out
outside/ˈaʊtˈsaɪd/
outside a building
outstanding/ˌaʊtˈstændɪŋ/
distinguished from others in excellence
oval/ˈoʊvəl/
having an egg-shaped outline or rounded form; an oval object
oven/ˈʌvən/
kitchen appliance used for baking or roasting
over/ˈoʊvɚ/
(cricket) the division of play during which six balls are bowled at the batsman by one player from the other team from the same end of the pitch
overall/ˈoʊvɚˌɔl/
involving only main features
overcharge/ˈoʊvɚˌtʃɑrdʒ/
rip off; ask an unreasonable price
overcome/ˈoʊvɚˌkʌm/
win a victory over
overcrowd/ˌoʊvɚˈkraʊd/
cause to crowd together too much
overdue/ˈoʊvɚˈdu/
past due; not paid at the scheduled time
overhead/ˈoʊvɚˈhɛd/
above your head; in the sky
overlook/ˌoʊvərˈlʊk/
look past, fail to notice
overnight/ˈoʊvɚˈnaɪt/
during or for the length of one night
overpay/ˈoʊvɚˌpeɪ/
pay too much
overseas/ˈoʊvɚˈsiz/
beyond or across the sea
oversee/ˈoʊvɚˌsi/
watch and direct
overtime/ˈoʊvərtaɪm/
work done in addition to regular working hours
overview/ˈoʊvɚˌvju/
a general summary of a subject
owe/oʊ/
be obliged to pay or repay
own/oʊn/
belonging to or on behalf of a specified person (especially yourself); preceded by a possessive
owner/ˈoʊnɚ/
(law) someone who owns (is legal possessor of) a business
ownership/ˈoʊnɚˌʃɪp/
the relation of an owner to the thing possessed; possession with the right to transfer possession to others