anodin

anodyne; ineffective; innocuous, harmless, trivial; trivial, unimportant, insignificant

“Les préparations de ciguë, d'opium, etc., sont des remèdes anodins.” — Preparations of hemlock, opium, and so forth, are known as anodynes.

Learned borrowing from Ancient Greek ἀνώδυνος (anṓdunos, “free from pain”), from ἀν- (an-, “without”) + ὀδύνη (odúnē, “pain”).