a prolonged, low, inarticulate sound uttered from or as if from physical or mental suffering.

any similar sound

the moan of the wind.

complaint or lamentation.

to utter moans, as of pain or grief.

(of the wind, sea, trees, etc.) to make any sound suggestive of such moans

The wind moaned through the trees.

to utter (something) inarticulately or pitifully, as if in lamentation

He moaned his response.

to lament or bemoan

to moan one's fate.

noun

beef , cry , gripe , grouse , grumble , lament , lamentation , plaint , sigh , sob , wail , whine , bay , ululation , yowl

verb

bemoan , bewail , carp , deplore , grieve , gripe , grouse , grumble , keen , lament , mourn , sigh , sob , wail , whine , bay , ululate , yowl , complain , cry , groan , sough , weep