moaning — a prolonged, low, inarticulate sound uttered from or as if from physical or mental suffering.
pining — to yearn deeply; suffer with longing; long painfully (often followed by for): to pine for one's home and family.
repining — to be fretfully discontented; fret; complain.
wailing — to utter a prolonged, inarticulate, mournful cry, usually high-pitched or clear-sounding, as in grief or suffering: to wail with pain.
weeping — expressing grief, sorrow, or any overwhelming emotion by shedding tears: weeping multitudes.
grief — keen mental suffering or distress over affliction or loss; sharp sorrow; painful regret.
bereavement — Bereavement is the sorrow you feel or the state you are in when a relative or close friend dies.
sorrow — distress caused by loss, affliction, disappointment, etc.; grief, sadness, or regret.
sadness — affected by unhappiness or grief; sorrowful or mournful: to feel sad because a close friend has moved away.
lamentation — the act of lamenting or expressing grief.
woe — grievous distress, affliction, or trouble: His woe was almost beyond description.
grieving — to feel grief or great sorrow: She has grieved over his death for nearly three years.
adjective mourning
complaining — to express dissatisfaction, pain, uneasiness, censure, resentment, or grief; find fault: He complained constantly about the noise in the corridor.
crying — notorious; lamentable (esp in the phrase crying shame)
bereaved — A bereaved person is one who has a relative or close friend who has recently died.
bereft — If a person or thing is bereft of something, they no longer have it.
cast down — If someone is cast down by something, they are sad or worried because of it.
despondent — If you are despondent, you are very unhappy because you have been experiencing difficulties that you think you will not be able to overcome.