indiscriminately; without distinction
Used adverbially to describe acting without regard to differences, often in a negative or reckless manner. Common in phrases like 見境なく～する.
彼は見境なくお金を使う。
He spends money indiscriminately.
見境なく人を信じてはいけない。
You shouldn't trust people without distinction.
Standard kanji spelling.
Variant using 無 instead of なく; less common but seen.
From 見境 (discernment, distinction) + なく (adverbial form of ない, 'without'). Literally 'without discernment'.