כָּמַר kâmar (H3648)

properly, to intertwine or contract, i.e. (by implication) to shrivel (as with heat); figuratively, to be deeply affected with passion (love or pity)

1) to yearn, be kindled, be black (hot), grow warm and tender, be or grow hot, become hot, become emotionally agitated 1a) (Niphal) 1a1) to grow warm and tender 1a2) to be or grow hot

a primitive root;