to study / to learn

mathematics (field of study)

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

蟻の子: ant, particularly one without wings; an ant egg or larva

榎, 朴, 𪱻: Chinese hackberry

pond in the wilderness

榎茸: enokitake

男, 男の子: a boy