1 variant: 背 bēi

1 surname Niu

1 cow's milk

2 classifier: 瓶 píng

3 classifier: 杯 bēi

1 beef

1 behind

2 at the back

3 in the rear

4 behind sb's back

1 lit. one hair from nine oxen (idiom)

2 fig. a drop in the ocean

1 tremendous strength (idiom)

1 lit. newborn calves do not fear tigers (idiom)

2 fig. the young are fearless

1 lit. why use a pole-ax to slaughter a chicken? (idiom)

2 fig. to waste effort on a trifling matter

3 also written 殺雞焉用牛刀|杀鸡焉用牛刀[shā jī yān yòng niú dāo]

1 arms around each other's shoulders (idiom)