I. ˈklash verb
Etymology: imitative
Date: circa 1500
intransitive verb
1. : to make a clash
cymbals clash ed
2. : to come into conflict
where ignorant armies clash by night — Matthew Arnold
also : to be incompatible
the colors clash ed
transitive verb
: to cause to clash
• clash·er noun
II. noun
Date: 1513
1. : a noisy usually metallic sound of collision
2.
a. : a hostile encounter : skirmish
b. : a sharp conflict
a clash of opinions