enclit. Particle, Ep. for ἄρα (q.v.), freq. in Hom. and Pi.; less freq. in Trag. (lyr.), ἦ ῥα A. Pers. 633, S. Aj. 172; ἤ ῥα ib. 177, B. 18.33.—This and κα are the only monosyll. Particles not ending in ε which allow elision.
The corpus record
ῥά
ra
Generated live from the audited corpus — every figure on this page is a database query, not prose from memory.
What it meant — LSJ
Where it came from
No etymology authority pointer is recorded for this lemma yet — an honest gap, not an omission. The etymological dictionaries (Beekes, Chantraine, Frisk) are matched incrementally.