he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

What? What did you say?

what / that thing (used in place of words you can't remember at the moment.)

Nothing

everything

What?, Huh?

plan

涸れる: to dry up / 枯れる: of a plant: to wither; to wilt; to die / 枯れる, 嗄れる: of one's voice: to become husky; to become hoarse

dead, dried leaf

(adverbial particle, dismissive, derogatory) emphasizes disgust, contempt, or otherwise negative feelings of the speaker: whatever