the.com/lamentation

means A passionate expression of grief or sorrow, especially one spoken, sung, or wailed aloud.

from From Latin 'lamentum' (a wailing, a moan), via the verb 'lamentari,' to wail or weep. The root may echo the sound itself — a cousin, possibly, of other words built from cries of pain rather than tidy consonants. By the time it reached English through Old French 'lamentation,' it had already shed any privacy; the word has always implied grief performed aloud, not grief kept to oneself.