Remnant comes from Middle English remenant, from Old French remanant ('remainder'), present participle of remanoir ('to remain'), from Latin remanere ('to stay behind'). The historical chain includes Old French remanant, Latin remanere, and Latin manere. The quoted older senses, "remainder", "to remain", and "to stay behind", supply the semantic anchors for remnant. The formation is best read as participial and borrowed: the word remnant carries its older form-history into a compact English lexical shape. In present English it is used as a noun, "a small remaining quantity of something". Related English forms include remain, remanent, and remainder. The result is a noun and adj whose etymology preserves both the older form and the later English specialization.