obey [to act as one is ordered to act]
She said she became a judge because she believed that people must obey the laws.

object [(1) to show that one does not like or approve; (2) to protest;(3) something not alive that can be seen or touched]
The lawyer said he would object if the disputed evidence was given. (1)
He objected strongly to the Senator's comment. (2)
She found a strange object near her house. (3)

observe [(1) to watch; (2) to look at carefully; (3) to celebrate or honor something]
She observed everyone who walked past her house. (1)
They observed the elections to report on possible violations of voting laws. (2)
They will observe the anniversary of the day she was born. (3)

occupy [to take and hold or to control by force]
Soldiers occupied the town fomp3erly controlled by rebels.

ocean [(1) the area of salt water that covers almost seventy-five percent of the earth's surface; (2) any of the five main divisions of this water]
We are going to the ocean for two weeks. (1)
He has sailed across the Pacific Ocean three times. (2)

of [(1) made from; (2) belonging to; (3) about; (4) connected to; (5) included among]
Her ring is made of gold. (1)
His son is a member of the Boy Scouts. (2)
That movie is the story of a woman who wins one million dollars. (3)
Someone broke the window of my car. (4)
One of my brothers is a doctor. (5)

off [(1) away; (2) at a distance; (3) condition when something is no longer operating or continuing; (4) not on; (5) not connected]
She walked off without speaking. (1)
The lake was 10 miles off. (2)
※one mile = 1.6 kilometers
The game is off because of rain. (3)
The electric power was off for three hours. (4)
He took off the rope so his dog could run. (5)

offensive [(1) a military campaign of attack;(2) having to do with attacking]
The government offensive began with an air attack. (1)
The weapons included a new offensive missile that destroys radar centers. (2)

offer [(1) to present or propose;(2) the act of presenting or proposing; (3) that which is presented or proposed]
He offered to help her find her car. (1)
Republican leaders made an offer to share power with the Democrats. (2)
She got a job offer from a computer company in Texas. (3)

office [(1) a room or building where business or work is done; (2) a public position to which one is elected or appointed]
Her office is on the fortieth floor of the new building. (1)
He was elected to the office of Vice President. (2)

officer [(1) a person in the military who commands others; (2) any person who is a member of a police force]
Her father is an amp3y officer in Gemp3any. (1)
Two police officers were honored for saving the lives of five people. (2)

official [(1) a person with power in an organization; (2) a representative of an organization or government;(3) of or about an office; (4) approved by the government or someone in power]
She is an official of our church council. (1)
Members of our local parents and teachers organization are electing an official to represent them at the state level. (2)
She read about it in the official newspaper. (3)
An official statement said the labor strike would begin at midnight. (4)

often [many times]
How often do you see each other?

oil [(1) a thick liquid that does not mix with water and that burns easily; (2) a black liquid taken from the ground and used as fuel]
Oil for heating homes costs a lot more this year. (1)
The president says America must produce more of the oil it needs. (2)

old [(1) not young or new; (2) having lived or existed for many years]
He has an old car and an old house. (1)
The old tree has been growing for more than three hundred years. (2)