"peripatetic quack; one who sells nostrums at fairs, etc.," in Johnson's words, "a doctor that mounts a bench in the market, and boasts his infallible remedies and cures;" 1570s, from Italian montambanco, contraction of monta in banco "quack, juggler," literally "mount on bench" (to be seen by crowd), from monta, imperative of montare "to mount" (see mount (v.)) + banco, variant of banca "bench," from a Germanic source (see bench (n.)). Figurative and extended senses, in reference to any impudent pretender or charlatan, are from 1580s. Related: Mountebankery.
also Sanscrit, ancient sacred language of India, 1610s, from Sanskrit samskrtam "put together, well-formed, perfected," neuter of samskrta, from sam "together" (from PIE root *sem- (1) "one; as one, together with") + krta- "to make, do, perform" (from PIE *kwer- "to make, form;" see terato-). "[S]o called as being the cultivated or literary language, distinguished from the vulgar dialects, or, some say, because regarded as a perfect language, the speech of the gods, formed by infallible rules" [Century Dictionary]. It continued as a learned tongue long after it ceased to exist as a vernacular.