Cribriform - cribrum, sieve.⏎
Clavicle - clavis, key or fastener. An ancient window fastener was a stick with a double curve.⏎
Azygos - azygos, unyoked (not a pair) named for its asymmetry.⏎
Arcuate - arcus, bow.⏎
Alveolus (alveolar) - alveolus, small compartment.⏎