unique

not ... at all

even if ...,...cannot

very, exceedingly, awfully / (before a negative form) not at all, at all, by no means

安寧: peacefulness, tranquillity, tranquility

音色: timbre

(Hachijō) elder sister

(music) Abbreviation of ギター (gitā, “guitar (of a rock band)”).

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