Termless is from term + -less. Term is from Old French terme ('limit, boundary, end'), from Latin terminus ('boundary, limit'). Important recorded forms include terme (Old French) and terminus (Latin). Morphologically, -less marks absence or lack, so the word names a state defined by being without the quality or thing expressed by the base. The modern sense continues the older lexical line without requiring a separate origin. In current use it covers having no limit or end; boundless. The wider family includes related words such as term, terminus, and terminate.