pining (n.)

• aching
• agony
• anguish
• care
• cracking
• decadent
• degenerate
• down
• downcast
• dwindling
• ebbing
• fading
• failing
• flagging
• grief
• hankering
• homesickness
• honing
• hypochondriac
• lamentation
• longing
• low
• misery
• nostalgia
• prostration
• sinking
• sliding
• sorrow
• subsiding
• waning
• wasting
• wilting
• withering
• woe
• worsening
• yearning
• yen