Indiscriminate means made without care about who or what is affected. Indiscriminate bombing, indiscriminate cutting, indiscriminate praise.
In the law of war it is a technical charge: an indiscriminate attack does not distinguish between fighters and civilians, and that is a war crime regardless of intent. In ordinary use it means undiscriminating — indiscriminate praise is worth nothing. Note discriminate, which here means to tell apart.
1adjectiveindiscriminateMade without care about who or what is affected.
“The indiscriminate use of antibiotics has made some bacteria resistant to them.”
indiscriminate is a quality of carelessness.
In- plus discriminate, from Latin discriminare, to divide or distinguish, from discrimen, a distinction.
Proto-Indo-European
*krey-
Latin
discrīminātus
English
discriminate
English, today
indiscriminate
Built from
1598; from in- + discriminate. discriminate 1615; Latin discrīminātus, perfect passive participle of discrīminō (“to divide, separate, distinguish”) (see -ate and -ate), from discrīmen (“a space between, division, separation, distinction”), from discernō (“to divide, separate, distinguish, discern”). by surface analysis, dis- + criminate.
Etymology from Wiktionary, CC BY-SA