the number of overlaps; fold, layer

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

よる: to be based on, to depend on, to be due to - (at most case) / 拠る: to be based on, to depend on / 因る: to be due to / 寄る: to drop by, to stop at / 選る: to select

夜: night

四: 4, four

四日: four days, fourth day of the month / 翼果: samara; winged seed (ash, maple, etc.) / 翼下: underwing (especially of an aircraft); under one's wing; under one's control