"lady's loose robe," 1835, from French peignoir, from Middle French peignouoir "loose, washable garment worn over the shoulders while combing the hair" (16c.), from peigner "to comb the hair," from Latin pectinare, from pecten (genitive pectinis) "a comb," related to pectere "to comb" (see fight (v.)). A gown put on while coming from the bath; misapplied in English to a woman's morning gown.
also moulder, "to crumble away, turn to mold or dust by natural decay," 1530s, probably frequentative based on mold (n.3) "loose earth." Related: Moldered; moldering.
1520s, from French laxité, from Latin laxitatem (nominative laxitas) "width, spaciousness," from laxus "loose, lax" (see lax). An earlier noun was laxation (late 14c.). Laxness is from 1630s.
"loose trousers of a strong material worn by cowboys, etc.," 1782, from over (adv.) + all. Specific sense "loose fitting canvas trousers with a bib and strap top" (originally worn by workmen over other clothes to protect them from wet, dirt, etc.) is attested by 1897. Compare French surtout "overcoat," literally "an over all," from sur- "over" + tout "all."