admit
[(1) to accept; (2) to express one's guilt or responsibility] When was the country admitted to the United Nations?
(1)
He admitted that what he did was wrong. (2)
adult
[a grown person]
Only an adult can sign the document.
advise
[to help with information, knowledge or ideas in making a decision]
Did you advise him to leave?
affect
[(1)to influence；(2)to produce an effect on]
A lack of sleep affected the singer's performance. (1) Mr. Nutley's belief in my talent greatly affected my life.
(2)
afraid