Kyūjitai form of 海洋学: oceanography

marine pollution

strengthens the prefixed adjective or adjectival noun

one who does the previous word's action: -ist, -er / (board games) counter for moves in shogi, go, etc.

hand / handicraft, skill, talent / one who does an action: -ist, -er / handwork

(childish) Alternative spelling of おてて (“hand”)

to hold in one's hand / to obtain

hand

(idiomatic) support, take someone's side, stand by someone

carry, take, bring (something)