In context: "...sarcasm and jokes were often the bottle i which clinical depressives sent out their most plangent screams for someone to care and help them."
Definition: Loud and resonant; reverberating; (also) that thrills or affects the emotions; mournful, plaintive-sounding.
Other: Check out this alternative definition: Of a wave, surf, etc.: making a beating, roaring, or crashing sound. Chiefly poet. Now rare.
Cool etymology too: < classical Latin plangent- , plangēns , present participle of plangere to strike noisily, beat the breast, lament aloud < a variant with nasal infix of the Indo-European base of ancient Greek πλήσσειν to strike
SNOOT score: 3
Source: Oxford English Dictionary