A prefix having to do with rising, sunrise and the east, appearing as ro-, hró-, and orró- and derived from √(S)RŌ (UT/165; PE17/18). Compare with the prefix oro- “up, aloft” of similar derivation (PE17/64).
Quenya
orró-
uprising, sunrise, east
orró-
prefix. uprising, sunrise, east
ro-
prefix. uprising, sunrise, east
Ambarónë
uprising, sunrise, orient
Ambarónë noun "uprising, sunrise, Orient" (AM2)
orró-, hró- "uprising, sunrise, east" (PE17:18), element underlying words like the following, and also hróna (q.v.)