Perispomenon

In Ancient Greek grammar, a perispomenon (περισπώμενον) is a word with a high-low pitch contour on the last syllable, indicated in writing by a tilde diacritic (◌̃) or an inverted breve accent mark (◌̑) in native transcriptions with the Greek alphabet, or by a circumflex accent mark (◌̂) in transcriptions with the Latin alphabet. A properispomenon has the same kind of accent, but on the penultimate syllable.

Examples:
 * θεοῦ, theoû, "of a god", is a perispomenon
 * πρᾶξις prâxis "business" is a properispomenon

Etymology
Peri-spō&#769;menon means "pronounced with a circumflex", the neuter of the present passive participle of peri-spáō "pronounce with a circumflex" (also "draw off"). Pro-peri-spō&#769;menon adds the prefix pró "before". περισπωμένη, perispomeni, is the Greek name for the accent marks (◌̃ or ◌̑) used above Greek letters, also known as ὀξύβαρυς, oxýbarys, "high-low" or "acute-grave", and its original form as a circumflex accent (◌̂) was combining the acute (◌́) and grave (◌̀) pitch accents occurring successively only in bimoraic syllables (with long vowels or diphthongs).