An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

A fine-grained rock formed by the metamorphosis of clay, shale, etc., that tends to split along parallel cleavage planes, usually at an angle to the planes of stratification (Dictionary.com).

M.E. sclate, from M.Fr. esclate, feminine of esclat "piece split off," (Fr. éclat) so called because the rock splits easily into thin plates.

Palmé "slate," "a board on which children learn to read," ultimately from Proto-Ir. *parn-, *parm- "feather," PIE *pernom-, *pornos- "feather," → tablet.

1a) Mechanics: To subject a body to → translation.
1b) Math.: To perform a → translation.
2a) To turn from one language into another.
2b) To convert computer data to a different form according to an → algorithm.

M.E. translaten, from L. translatus, from → trans- "across" + latus suppletive p.p. of ferre "to carry;" cognate with Pers. bordan "to carry, transport;" Mid.Pers. burdan; O.Pers./Av. bar- "to bear, carry," barəθre "to bear (infinitive);" Skt. bharati "he carries;" Gk. pherein "to carry;" PIE base *bher- "to carry."

1) Tarâjâyidan, from tarâ-, → trans- "across" + jâ "place" (from Mid.Pers. giyag "place;" O.Pers. ā-vahana- "place, village;" Av. vah- "to dwell, stay," vanhaiti "he dwells, stays;" Skt. vásati "he dwells;" Gk. aesa (nukta) "to pass (the night);" Ossetic wat "room; bed; place;" Tokharian B wäs- "to stay, wait;" PIE base *ues- "to stay, live, spend the night") + -idan infinitive suffix.
2) Tarâzabânidan, from tarâ-, as above, + zabân "tongue; language" (Mid.Pers. uzwân "tongue; language;" O.Pers. hzanm, hizānam "tongue;" Av. hizuua-, hizū- "tongue;" cf. Skt. jivhā- "tongue;" L. lingua "tongue, speech, language;" O.Ir. tenge; Welsh tafod; Lith. liezuvis; O.C.S. jezyku; M.Du. tonghe; Du. tong; O.H.G. zunga; Ger. Zunge; Goth. tuggo; PIE base *dnghwa-) + -idan infinitive suffix. The similarity of tarâzabân with the classical Pers. terms tarzafân, tarzabân "a person who translates orally from one language into another; eloquent" is intriguing: from tar- variant of tarâ- + zafân, zabân "tongue, language"?!