花糸: filament (stalk of a stamen in a flower) / 貸し: loan, to make someone in debt / 菓子: sweet, confection / 歌詞: lyrics / 下歯: lower teeth / 仮死: apparent death, suspended animation / 樫: evergreen oak

ren'yōkei of 貸す: to lend / ren'yōkei of 化す: to transform / ren'yōkei of 課す: to impose

(archaic) Shows emphasis.

ability; capability; capacity; faculty

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

(と〜) thinking that […] (with the next clause explaining that the truth is contrary to expectations)

to seem, to appear

continuative of the passive of 思う (omou); continuative of 思われる (omowareru)