Est
1970s (originally US): acronym from Erhard Seminars Training, from the name of Werner Erhard (born 1935), the American businessman who devised the technique.
wiktionary
From Middle English este, from Old English ēst(“will, consent, favour, grace, liberality, munificence, bounty, kindness, love, good pleasure, harmony, liberal gifts, luxuries”), from Proto-Germanic *anstiz(“favour, affection”), from Proto-Indo-European *ān-(“to notice; face, mouth”) or from *h₃neh₂-(“to bestow, offer, help; to enjoy”). Cognate with Icelandic ást(“affection, love”), Dutch gunst(“favour, grace, courtesy, privilege”), German Gunst(“favour, goodwill, boon”), Danish yndest(“favour”), Swedish ynnest(“favour, indulgence, grace”). More at own.
est (not comparable)
Initialism.
