squinch

nouns

a small arch built across the interior angle of two walls (usually to support a spire)
is a type of (narrower)
(architecture) a masonry construction (usually curved) for spanning an opening and supporting the weight above it

verbs

crouch down
is a type of (narrower)
bend one's back forward from the waist on down
"he crouched down"; "She bowed before the Queen"; "The young man stooped to pick up the girl's purse"
draw back, as with fear or pain
"she flinched when they showed the slaughtering of the calf"
cross one's eyes as if in strabismus
"The children squinted so as to scare each other"