morale

Morale comes from French morale, which traces back to Latin mōrālis, built from mōs (custom, manner) plus the adjective-forming suffix -ālis. English borrowed the French word directly.

The facts given show only the borrowing from French into English; no further shift in meaning is recorded here.

Morale shares its root with moral and morality, all descending from Latin mōrālis and ultimately mōs, meaning custom or manner.