difficult; hard to do; troublesome; not easy; problematic; the opposite of 容易 róng​yì

to distinguish; to differentiate; to recognize or identify

a tool used in weaving to carry the crosswise threads back and forth across the loom; often shaped like a date seed

(bound form) appearance; form; shape

A dormant, resilient structure formed by certain bacteria or fungi, such as a gemma or an endospore; it can grow into a new individual when environmental conditions are suitable.

bacillus; any rod-shaped bacteria