What is the meaning of ?

The hiragana syllable (u). Its equivalent in katakana is (u). It is the third syllable in the gojūon order; its position is (a-gyō u-dan, row a, section u).

Expressing one's will to do something.

Inducing or stimulating other person to do something.

to try to do; to attempt to do

to be about to do; to be on the verge of doing

Presenting a supposition.

whetheror

Alternative form of (-ku, adverbial suffix of -i adjectives)

Source: wiktionary.org