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
察
caat3
to examine
to inquire
to observe
to inspect
to look into
obvious
clearly evident
to notice
纳
naap6
receive
Learn Stroke Order
See how to write "已知" with stroke-by-stroke animation