obey

v

to act as one is ordered to act

object

v

to show that one does not like or approve; to protest

n
something not alive that can be seen or touched

observe

v

to watch; to look at carefully; to celebrate or honor something ("They will observe the anniversary of the day she was born.")

occupy

v

to take and hold or to control by force

ocean

n

the area of salt water that covers almost seventy-five percent of the earth's surface; any of the five main divisions of this water

of

prep

made from; belonging to; about; connected to; included among

off

ad

away; at a distance; condition when something is no longer operating or continuing; not on; not connected

offensive

n

a military campaign of attack

ad
having to do with attacking

offer

v

to present or propose

n
the act of presenting or proposing; that which is presented or proposed

office

n

a room or building where business or work is done; a public position to which one is elected or appointed

officer

n

a person in the military who commands others; any person who is a member of a police force

official

n

a person with power in an organization; a representative of an organization or government

ad
of or about an office; approved by the government or someone in power

often

ad

many times

oil

n

a thick liquid that does not mix with water and that burns easily; a black liquid taken from the ground and used as fuel

old

ad

not young or new; having lived or existed for many years

on

prep

above and held up by; touching the upper surface of ("The book is on the table."); supported by ("He is on his feet."); about ("The report on the meeting is ready."); at the time of ("He left on Wednesday.")

once

ad

one time only

only

ad

being the single one or ones; no more than ("We have only two dollars.")

open

v

to start ("They opened talks.")

ad
not closed; not secret

operate

v

to do work or a job; to cut into the body for medical reasons

opinion

n

a belief based on one's own ideas and thinking

oppose

v

to be against; to fight against

opposite

ad

different as possible; completely different from; exactly the other way ("North is the opposite direction from south.")

oppress

v

to make others suffer; to control by the use of unjust and cruel force or power

or

conj

giving another of two choices; giving the last of several choices

orbit

v

to travel in space around a planet or other object

n
 the path or way an object travels in space around another object or planet

order

v

to give a command; to tell someone what to do

n
a command; the correct or normal way things are organized; a peaceful situation in which people obey laws

origin

n

the place where something starts, or the process by which it starts

organize

v

to put in order; to put together into a system

other

ad

different; of another kind; the remaining one or ones of two or more ("That man is short; the other is tall.")

our

ad

of or belonging to us

out

ad

away from the inside; opposite of in

over

conj

above; covering; across, in or on every part of ("all over the world")

overthrow

v

to remove from power; to defeat or end by force

owe

v

to pay or have to repay (usually money) in return for something received

own

v

to have or possess for oneself

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