smile, happy face, smiling face

an instant / moment

刹那: instant, moment

a female given name

切ない: painful, trying or oppressive

roughly 0.11 seconds, defined as 1/65ᵗʰ of a 弾指 (danshi), where a danshi is 1/12,000ᵗʰ of a day or 7.2 seconds / 0.002 seconds, defined as 1/60ᵗʰ of a 念 (nen), where a nen is 1/60ᵗʰ of a 弾指 (danshi)

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

poignantly sad; filling one with great sadness / suffocating; oppressive