(used after an adverb such as 不, 大, 稍 etc, and before a disyllabic verb, to indicate that the action of the verb is applied to sth or sb previously mentioned)
to apply (restrictions etc) to (sb)
to give (support, consideration etc) to (sth)
to increase
to augment
to append
干
gon1
dry
酵母
haau4 mou5
yeast
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See how to write "酵母" with stroke-by-stroke animation