1 half

1 to exchange

2 exchange

3 communication

4 interaction

5 to have social contact (with sb)

1 half

2 semi-

3 incomplete

4 (after a number) and a half

1 midnight

2 in the middle of the night

1 the middle of the night

1 lit. a full bottle makes no sound; a half-filled bottle sloshes (idiom)

2 fig. empty vessels make the most noise

1 lit. to know one and understand half (idiom); a smattering of knowledge

2 dilettante

3 amateur

1 lit. one scale and half a claw (idiom); only odd bits and pieces

1 half the work, twice the effect (idiom); the right approach saves effort and leads to better results

2 a stitch in time saves nine

1 man seeks his way up just as water seeks its way down (idiom)

2 one should constantly strive to make progress