Traditional:

ㄩˇ

  1. and together with (linking parallel nouns, verbs, or phrases)

    formal

  2. with from (marking the other participant in an interaction, comparison, or contrast, e.g. 與他握手|与他握手[yu3 ta1 wo4 shou3] "shake hands with him", 與去年不同|与去年不同[yu3 qu4 nian2 bu4 tong2] "different from last year")

    formal

  3. to give to grant to bestow

    literary

ㄩˋ

  1. to take part in

Where 与 is used

Sources