FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

rhonnumi ῥώννυμαι — hrone'-noo-mee — prolongation from rhoomai (to dart; probably akin to 4506); to strengthen, i.e. (impersonal passive) have health (as a parting exclamation, good-bye):--farewell.

see GREEK for 4506