Note: The Oxford English Dictionary, first edition, and Oxford Dictionary of English Etymology take the Middle English verb to be a loan from Middle Dutch or Middle Low German, though it seems equally or more probable that it is a native formation, as was Walter Skeat's view.

Note: The earliest sense of this word, "edge of a garment," is first attested in the English-Latin dictionary Promptorium parvulorum (ca. 1440), in the entry "Slyp, or skyrte: Lascinia [for classical lacinia 'border of a garment, edge, hem']." Presumably derived from this meaning is sense 2. The meaning "scion, offspring" (sense 1 and hence sense 3) is first attested in Wynkyn de Worde's printed edition (1495) of the medieval encyclopedia De proprietatis rerum, adapted from John of Trevisa's 14th-century English translation. It is not clear how "scion, offspring" might relate to the other English meanings ("strip of material" > "shoot of a plant"?), or to the presumed Middle Dutch/Middle Low German etyma, which have no comparable sense. -- The word slyp is also attested in the sense "cleft, crack" in late Middle Dutch (the dictionary Teuthonista of Duytschlender of Gert van der Schueren, 1477); it has been suggested that this was the earliest sense, with "cleft in a piece of fabric" leading to the meaning "loose end of a garment." The noun slyp is clearly derived from an earlier verb slippen "to split," which may be a weak derivative *slippōn- (< *slib-no-) of a Germanic strong verb *sleiban- evident in Old English tōslāf "(s/he) split, cleaved," assumed infinitive tōslīfan (see sliver entry 1).

Note: This account of the origin of *sleupan- is based on R. Lühr, Expressivität und Lautgesetz im Germanischen (Heidelberg, 1988), p. 352; her hypothesis is taken up in Lexikon der indogermanischen Verben (2. Auflage, 2001), s.v. *sleu̯b^h-. As the author points out, this back-formation would have to extend as far as the ancestor of Gothic to account for the verb in that language.