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up or over; hence, manifesting exhilaration or excitement, as of feeling; effervescing. "Ebullient with subtlety." De Quincey. The ebullient enthusiasm of the French. Carlyle.

as in effuse. The form e- occurs instead of ex- before b, d, g, l, m, n, r, and v, as in ebullient, emanate, enormous, etc. In words from the French it often appears as es-, sometimes as s- or é-; as, escape, scape, élite. Ex-, prefixed to names implying office, station, condition, denotes that the person formerly hel…