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Old English liðe "soft, mild, gentle, meek," from Proto-Germanic *linthja- (cf. Old Saxon lithi "soft, mild, gentle," Old High German lindi, German lind, Old Norse linr, with characteristic loss of "n" before "th" in English), from PIE root *lent- "flexible" (cf. Latin lentus "flexible, pliant, slow," Sanskrit lithi). In Middle English, used of the weather. Current sense of "easily flexible" is from c.1300. Related: Litheness.
Object-oriented with extensible syntax.
"LITHE: A Language Combining a Flexible Syntax and Classes", D. Sandberg, Conf Rec 9th Ann ACM Sym POPL, ACM 1982, pp.142-145.