(no doubts): clear, obvious, distinct / (appearing; comprehensible by sight): apparent, visible

character of human (personality), or of things.

二重性: duality / 二重星: double star

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

何: interrogative pronoun; what

何か: something

Used other than figuratively or idiomatically: see なに, これ.

何者: someone; anyone / 何物: what

Nothing