努  

[nǔ]

- （使出） put forth (strength); exert (effort):

put forth all one's strength;

努劲儿

Let's make still greater efforts.

大家再努一把劲。

- （凸出） protrude; bulge:

with bulging eyes;

努着眼睛

I pouted my lips at him, hinting that he should speak first.

我向他努了努嘴，让他先说。

- （用力太过，身体内部受伤） injure oneself through overexertion:

Don't carry that heavy trunk, or you'll strain yourself.

箱子太沉，你别扛，看努着。