明らか
あきらか · akiraka · JLPT N3 · na-adj
obvious
☀️🌙 明 = sun 日 + moon 月: so bright that it's obvious
The kanji 明 puts the sun (日) beside the moon (月), so its basic meaning is bright. Anything lit that well is plain for everyone to see, which gives clear and obvious. The same kanji appears in 説明 (setsumei, explanation): making something clear.