classifier for long thin things (rivers, cracks etc), barriers (walls, doors etc), questions (in an exam etc), commands, courses in a meal, steps in a process
province (of Korea or Japan)
channel
method
doctrine
teachings
持久
ci4 gau2
durable
不衰
bat1 seoi1
Never decline
Learn Stroke Order
See how to write "不衰" with stroke-by-stroke animation