main, principal, important

heavy, weighty / involving large-scale manufacture, heavy / great in degree, heavy, serious, severe, hard, difficult

weight

(Classical Japanese, archaic) to pile, add layers, stack, heap / (Classical Japanese, archaic) to repeat

heavy; important

(chiefly women's speech) first person singular pronoun: I, me

kei truck, Japanese mini truck

(polite) first-person singular pronoun: I, me

a personal or private matter / (by extension) selfishness

(formal) first-person singular pronoun: I, me