Slide
Old English slīdan (verb); related to sled and sledge1. The noun, first in the sense ‘act of sliding’, is recorded from the late 16th century.
wiktionary
From Middle English sliden, from Old English slīdan(“to slide”), from Proto-Germanic *slīdaną(“to slide, glide”), from Proto-Indo-European*sléydʰ-e-ti, from *sleydʰ-(“slippery”). Cognate with Old High German slītan(“to slide”) (whence German schlittern), Middle Low German slīden(“to slide”), Middle Dutch slīden(“to slide”) (whence Dutch slijderen, frequentative of now obsolete slijden), Vedic Sanskrit स्रेधति(srédhati, “to err, blunder”).
etymonline
slide (v.)
Old English slidan (intransitive, past tense slad, past participle sliden) "to glide, slip, fall, fall down;" figuratively "fail, lapse morally, err; be transitory or unstable," from Proto-Germanic *slidan "to slip, slide" (source also of Old High German slito, German Schlitten "sleigh, sled"), from PIE root *sleidh- "to slide, slip" (source also of Lithuanian slysti "to glide, slide," Old Church Slavonic sledu "track," Greek olisthos "slipperiness," olisthanein "to slip," Middle Irish sloet "slide").
Meaning "slip, lose one's footing" is from early 13c. Transitive sense from 1530s. Phrase let (something) slide "let it take its own course, take no consideration of" is in Chaucer (late 14c.) and Shakespeare. Sliding scale in reference to payments, etc., is from 1842.
slide (n.)
1560s, from slide (v.). As a smooth inclined surface down which something can be slid, from 1680s; the playground slide is from 1890. Meaning "collapse of a hillside, landslide" is from 1660s. As a working part of a musical instrument from 1800 (as in slide-trombone, 1891). Meaning "rapid downturn" is from 1884. Meaning "picture prepared for use with a projector" is from 1819 (in reference to magic lanterns). Baseball sense is from 1886. Slide-guitar is from 1968.
