n. 25B6; verb
I am pining away from love : LANGUISH, decline, weaken, waste away, wilt, wither, fade, sicken, droop; brood, mope, moon.
he was pining for his son : YEARN, long, ache, sigh, hunger, languish; miss, mourn, lament, grieve over, shed tears for, bemoan, rue, eat one's heart out over; informal itch.