1 (negative prefix)

2 not

3 no

1 cell phone

2 mobile phone

3 classifier: 部 bù

4 classifier: 支 zhī

1 a skill

2 mastery of a trade

3 by oneself

4 without outside help

1 to obtain

2 to master

3 overhand (serve etc)

4 seat of honor

1 to start

2 to put one's hand to

3 to set about

4 the seat to the right of the main guest

1 don't do it, or don't rest (idiom); either give up, or go through to the end

2 Since we started, we must carry it through whatever happens.

3 in for a penny, in for a pound

1 lit. to reply "don't know" whatever the question (idiom)

2 fig. absolutely no idea of what's going on

3 complete ignorance

1 untainted by even a speck of dust (idiom); selfless and incorruptible

2 spotless

1 to not mention a single word (about sth) (idiom)

1 lit. the mountain can't have two tigers (idiom)

2 fig. this town ain't big enough for the two of us

3 (of two rivals) to be fiercely competitive