口 kǒu, mouth/classifier for things with mouths (people, domestic animals, cannons, well... 吼 hǒu, to roar/to howl/to shriek/roar or howl of an animal/bellow of rage 孔 Kǒng/kǒng, surname Kong, hole/CL:個|个[gè]/classifier for cave dwellings 乚 yà, component in Chinese characters/archaic variant of 毫[háo]/archaic variant of 乙[y... 孑 jié, all alone