彼の目が不自然に輝いてた

N5 彼 kare he N5 目 me eye N3 不 fu un(~), non(~), negative prefix N3 自然 shizen nature, natural, spontaneous

N3 彼 hi / kare, kano, ka.no he, that, the N4 目 moku, boku / me, -me, ma- eye, class, look N4 不 fu, bu negative, non-, bad N4 自 ji, shi / mizuka.ra, ono.zukara, ono.zuto oneself, soi-même, uno mismo N3 然 zen, nen / shika, shika.ri, shika.shi, sa sort of thing, so, if so N1 輝 ki / kagaya.ku radiance, shine, sparkle

N5 〜が ga Marks the grammatical subject, highlights new information, can also show slight contrast in some sentences N5 〜に ni Indicates destination, target, arrival point, specific time, or person receiving an action N5 〜の no Indicates possession, relation between nouns, nominal explanation, or turns a verb into a noun phrase