*ebullient \ih-BUL-yuhnt\ (adjective) –
1 : Overflowing with enthusiasm or excitement; high-spirited.
2 : Boiling up or over.
"He was extremely nervous and extremely jealous of other tenors and he covered his nervous jealousy with an ebullient friendliness." — James Joyce, ‘Dubliners’
Ebullient comes from Latin ebullire, "to bubble up," from e-, "out of, from" + bullire, "to bubble, to boil."
efficacious \ef-ih-KAY-shuhs\ (adjective) – Possessing the quality of being effective; producing, or capable of producing, the effect intended; as, an efficacious law.
"Plagued by rats, the citizens of Hamelin desperately sought an efficacious method of pest control."
Efficacious is from Latin efficax, -acis, from efficere, "to effect, to bring about," from ex-, "out" + facere, "to do or make."
encomium \en-KOH-mee-uhm\ (noun) – An often formal expression of warm or high praise.
"HRH absorbed the encomiums with the dignity of his office, nodding slowly but continuously as encomium toppled over encomium in quick succession." — Vincent Chukwuemeka Ike, ‘The Naked Gods’
Encomium derives, via Latin, from Greek enkomion, from en-, "in" + komos, "revel."
enmity \EN-mih-tee\ (noun) – Hatred; ill will; hostile or unfriendly disposition.
"Such was the enmity between the two parties that simply getting them into a room together was a major victory."
From old French enemistie, from V.L. inimicitatem (nom. inimicitas), from L. inimicitia "enmity, hostility," from inimicus "enemy"
ephemeron \ih-FEM-uh-ron\ (noun) plural ephemera \ih-FEM-uh-ruh\ –
1 : Something short-lived or of no lasting significance.
2 : ephemera: Items, especially printed matter (as posters, broadsides, pamphlets, etc.), intended to be of use or importance for only a short time but preserved by collectors.
"She had seen that the finger of Death was upon her bosom – that, like the ephemeron, she had been made perfect in loveliness only to die…" — Edgar Allen Poe, ‘The Fall of the House of Usher and Other Writings’
Ephemeron is from Greek, from ephemeros, "daily; lasting or living only a day," from epi, "upon" + hemera, "day."
eremite \ER-uh-myt\ (noun) – A hermit, especially a religious recluse.
"After he was dumped by Cecelia, Brandon became a hermit, a virtual eremite whose room was covered with pictures of his beloved, a shirne to her beauty and his love for her."
Eremite derives from Late Latin eremita, from Greek eremites, "living in the desert," from eremia, "desert," from eremos, "lonely, solitary, desolate."
espy \ih-SPY\ (transitive verb) – To catch sight of; to perceive with the eyes; to discover, as a distant object partly concealed, or not obvious to notice; to see at a glance; to discern unexpectedly; to spy; as, to espy land; to espy a man in a crowd.
"The seamen espied a rock within half a cable’s length of the ship."
Espy is from Old French espier, to watch, ultimately of Germanic origin; akin to Old High German spehon. The act of espying is espial.
exergy \EK-sehr-jee\ (noun) – Potential energy to do work; the useful capacity of an energy source to perform work.
"Anita has enough exergy to fill two positions like the one she currently occupies."
A recent neologism by analogy with "energy," from Greek energeia, the noun from energos "active." Today’s word would be based on ex- "from" + ergon "work," found in "ergonomics" and "surgery," from Latin "chirurgia" from Greek kheirourgia "hand-work" based on kheir "hand" + erg- "work" + ia, noun suffix. The o-grade, *org-, turns up in Greek organ "tool" and orgia "sacred rite," the origin of "orgy." The same root underlying erg-/org- became "work" in English and "werken" in Dutch.
exigent \EK-suh-juhnt\ (adjective) –
1 : Requiring immediate aid or action; pressing; critical.
2 : Requiring much effort or expense; demanding; exacting.
"Contrary to what Sloan had considered during the campaign, as a Congressman legislative sessions were long, constituents’ demands exigent, and policy problems were increasingly complicated."
exiguous \ig-ZIG-yoo-us\ (adjective) – Extremely scanty; meager.
"Janice worked as a waitress in an effort to supplement her exiguous income working at a big box retailer, although neither employer was sympathetic to the other’s schedule."
Exiguous comes from Latin exiguus, "strictly weighed; too strictly weighed," hence "scanty, meager," from exigere, "to determine; to decide; to weigh."