Atonic

Characterized by atony, or want of vital energy; as, an atonic disease.

Unaccented; as, an atonic syllable.

Destitute of tone vocality; surd.

A word that has no accent.

An element of speech entirely destitute of vocality, or produced by the breath alone; a nonvocal or surd consonant; a breathing.

A remedy capable of allaying organic excitement or irritation.