Where does “unbridled” come from?

Unbridled comes from English un- plus bridled, with un- deriving from Latin unus, Proto-Indo-European óynos, ano-, ne, and h₂ent-, ultimately expressing negation or absence.

unbridled (English): Not fitted with a bridle; Without restraint or...

Definitions

Not fitted with a bridle; Without restraint or...

Ancestry of “unbridled”, step by step

Step	Language	Word	Meaning
1	English	Un-	not
2	Middle English	un-	—
3	Old English	un-	negation or absence of: un-, non-; bad; forms...
4	Proto-West Germanic	un-	not, un-
5	Proto-Germanic	un-	not, un-
6	Proto-Indo-European	n̥-	not, un-
7	Proto-Indo-European	ne	not

Words derived from “unbridled”

unbridledness
unbridledly

Every word from Proto-Indo-European ne →Every word from English Un- →Every word from Proto-Indo-European n̥- →