lipless
Word family
Synonym discussion
Sense: adjective/1
Thin-lipped, tight-lipped, and lipless all relate to the mouth but differ in scope and connotation. Thin-lipped is the most common and can describe both a person's natural mouth shape and, figuratively, a person who looks angry or unfriendly ('He gave a thin-lipped frown'). Tight-lipped almost always refers to someone who refuses to speak or share information ('She stayed tight-lipped about the surprise'). Lipless is the most literal and neutral — it describes a physical absence or near-absence of lip tissue without any emotional implication. For example: 'The doctor noted the patient's naturally lipless mouth' versus 'His thin-lipped expression showed his disapproval.'
Common collocations
Etymology
Formed from the noun 'lip' (from Old English lippa, meaning the soft edge of the mouth) plus the suffix '-less' (from Old English -leas, meaning 'without'). The word has been used since the 1600s to describe a mouth or face lacking visible lips.