Origin of buckle

1300–50; Middle English bocle < Anglo-French bo(u)cle, bucle < Latin buc(c)ula cheekpiece (of a helmet), strip of wood, etc., resembling a cheekpiece, equivalent to bucc(a) cheek + -ula -ule

OTHER WORDS FROM buckle

buck·le·less, adjective re·buck·le, verb, re·buck·led, re·buck·ling.

British Dictionary definitions for buckle under

buckle
/ (ˈbʌkəl) /

noun

a clasp for fastening together two loose ends, esp of a belt or strap, usually consisting of a frame with an attached movable prong
an ornamental representation of a buckle, as on a shoe
a kink, bulge, or other distortion a buckle in a railway track

verb

to fasten or be fastened with a buckle
to bend or cause to bend out of shape, esp as a result of pressure or heat

Word Origin for buckle

C14: from Old French bocle, from Latin buccula a little cheek, hence, cheek strap of a helmet, from bucca cheek

Idioms and Phrases with buckle under

buckle under

Give way, collapse owing to stress, as in One more heavy snowfall and the roof may buckle under, or She buckled under the strain of two jobs. [Late 1500s]