Combining form of いそ (iso) above: fifty, 50

(by extension) Combining form of いそ (iso) above: a large quantity

fifteen; 15

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend

idea, invention

a pentadecagon

fifteenth day of the month

twenty-five; 25