important, significant

importance, consequence, significance

to put in parentheses

a parenthesis; a bracket (either of a pair of brackets ( )) / (by extension) a bracket (generically any of "(", ")", "[", "]", "{", "}", "<" and ">")

part, section, segment, portion

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

potential of 入る (hairu)

to put (something) in / to admit (someone) in / to tuck in (clothing)

he; boyfriend