to find it difficult to; to be unable to

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

61 years of age (in East Asian age reckoning)

overheating / superheating

to overheat / to superheat

find it difficult to do, be unable to do

being inflammable, combustible

to heat