Unknown
Unclear, Uncertain, Unsure
noun, な adjective
When it's not bright, you can't see what's around you. In the dark, everything feels unknown, unclear, and uncertain.
This is a jukugo word, which usually means on'yomi readings from the kanji. You didn't learn the on'yomi for 明 (めい) with the kanji, so here's a mnemonic to help you remember it:
Everything feels particularly unknown, unclear, and uncertain in May (めい) because May is when you suddenly realize you still don't know what you're doing this year — your plans are as foggy as morning mist. You sigh, "めい-be next month I'll have it together."
不明なまま
remains unknown
不明な点
unknown point, unknown aspect
不明なこと
something unclear
ご不明な点
questions, unclear points
ご不明なとき
when unsure
ご不明な方
those who are unsure
作者不明
author unknown, creator unknown
正体不明
unknown, unidentifiable
意味不明
meaning unclear, nonsense
このホテルは、オーナーが不明です。
The owner of this hotel is unknown.
生まれた日は不明です。
The day of birth is unknown.
私の兄は今どこにいるか不明なんです。
It's uncertain where my brother is now.