Strong's Definition
of uncertain (perhaps Egyptian) derivation; a bulrush or any marshy grass (particularly that along the Nile)
KJV Usage: flag, meadow
STEPBible — Tyndale Abridged Hebrew Lexicon
אָחוּ (a.chu) — meadow. reeds, marsh plants, rushes
UBS Dictionary of Biblical Hebrew
UBS Dictionary of Biblical Hebrew © United Bible Societies, licensed CC BY-SA 4.0.
Brown-Driver-Briggs Hebrew Lexicon
אָחוּ n.m. Jb 8:11 coll. reeds, rushes base