Etymology
Advertisement
cranny (n.)

"small, narrow opening, crevice," mid-15c., possibly from a diminutive of Old French cran, cren "a notch, a hole, a cut, fissure" (14c.), from crener "to notch, split," from Medieval Latin crenare, which is possibly from Latin cernere "to separate, sift" (from PIE root *krei- "to sieve"). Compare Old French crene "notched." But OED casts doubt on this derivation. Related: Crannied (mid-15c.).

Related entries & more 
Advertisement
crenel (n.)

also crenelle, "open space on an embattlement," mid-13c., carnel, kernel, from Old French crenel "a notch; embrasure" (12c., Modern French créneau), apparently a diminutive of cren "a notch," from Latin crena (see cranny).

Related entries & more