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初めて白髪見つけた😭って言ったら4歳が「えっ見せて！わぁ！」
→ “When I said, 'I found my first gray hair 😭', a 4-year-old went, 'Eh?! Let me see! Wow!' (literally: 'Show me! Wow!')”
初めて hajimete = for the first time (adverb)
白髪 shiragami = gray hair (n.)
白 shiro = white
髪 kami = hair
見つけた mitsuketa = found (v., past tense of 'to find')
見 mi = see / look
つけ tsuke = attach / put on
た ta = past tense marker
😭 = crying emoji (interjection)
って tte = quotation marker / colloquial 'to say' (particle)
言ったら ittara = when I said (conditional form of 'to say')
言 i = say / speak
った tta = colloquial past contraction of 'itai'
ら ra = conditional particle ('if/when')
4歳 yonsai = 4 years old (noun phrase)
4 yon = four
歳 sai = years old / age
が ga = subject marker particle (nominative case)
「 = opening quotation mark
えっ e = eh?! / huh?! (surprised interjection)
見せて！ misete! = let me see! (imperative/te-form request)
見 mi = see
せ se = causative stem of 'miru'
て te = te-form connector
！ = exclamation mark
わぁ！ waa! = wow! (expression of awe/excitement)
」 = closing quotation mark
