1 center

2 heart

3 core

4 classifier: 个 gè

1 to grieve

2 to be broken-hearted

3 to feel deeply hurt

1 heart

2 innermost being

3 (math.) incenter

1 mouth

2 classifier for things with mouths (people, domestic animals, cannons, wells etc)

3 classifier for bites or mouthfuls

1 to be careful

2 to take care

1 of one heart and one mind (idiom)

1 to do two things at once (idiom)

2 to multitask

3 to divide one's attention

1 to set one's heart on sth (idiom)

1 in two minds about sth (idiom)

2 half-hearted

3 shilly-shallying

1 (idiom) reluctant to speak about it

2 tight-lipped