Caledwch, n. hardness
Calen, n. a whetstone
Calon, n. a heart; a centre
Calondid, n. heartiness
Calonog, hearty, valiant
Calonogi, to hearten up, to encourage
Calonogrwydd, n. heartiness
Call, n. what starts out
Call, a. wise, prudent
Callaidd, a. somewhat cunning