source: [冴えない彼女の育てかたの霞ヶ丘詩羽に光が差すGIF画像｜無料GIF画像検索 GIFMAGAZINE 873356]

shine faintly with a wavering light:

かすかに光る, ちらつく.

e.g. the moonlight glimmered on the lawn

e.g. (as adjective glimmering) : pools of glimmering light.

a faint or wavering light.

かすかな光, ちらちらする光.

a faint sign of a feeling or quality, especially a desirable one:

わずかなしるし, 認識

e.g. there is one glimmer of hope for Becky.

glimmeringly adverb

late Middle English: probably of Scandinavian origin; related to Swedish glimra and Danish glimre.