probably from the same as ἁρπάζω; properly, a headache (as a seizure of pain) from drunkenness, i.e. (by implication) a debauch (by analogy, a glut):--surfeiting.
from ἐπί and ἵστημι; to stand upon, i.e. be present (in various applications, friendly or otherwise, usually literal); --assault, come (in, to, unto, upon), be at hand (instant), present, stand (before, by, over).
from a compound of Α (as a negative particle) and φαίνω (compare ἐξαίφνης) (meaning non-apparent); unexpected, i.e. (adverbially) suddenly:--sudden, unawares.
prolonged from a primary (Latin cor, "heart"); the heart, i.e. (figuratively) the thoughts or feelings (mind); also (by analogy) the middle:--(+ broken-)heart(-ed).
TRV