Ad. rûkh n. (weak-I neut) “shout” (Category: to Shout, Cry Out)
A word glossed “shout” (SD/426). Andreas Moehn suggested (EotAL/RUKH) that it may be a verb rûkh- “to shout”, but it appears in a list of nouns, so I think it likelier that it is noun form.
Reference ✧ SD/426 ✧ rūkh “shout”