1 to lose (sth)

2 to drop (sth)

3 to feel a sense of loss

4 frustrated

5 disappointment

6 loss

1 to leave out

2 to be missing

3 to leave behind or forget to bring

4 to lag or fall behind

1 to fall

2 to drop

3 to land (of projectile)

1 to fall behind

2 to lag (in technology etc)

3 backward

4 to retrogress

1 nook

2 corner

1 lit. to drop a thousand zhang in one fall (idiom)

2 fig. (of business, popularity etc) to suffer a sudden, devastating decline

3 to take a dive

1 (idiom) everything broken and in disorder

1 lit. not to shed a tear until one sees the coffin (idiom)

2 fig. refuse to be convinced until one is faced with grim reality

1 lit. to be struck by an arrow and fall from one's horse

2 to suffer a serious setback (idiom)

1 open and candid (idiom); straightforward and upright