Strong's H3545כֵּהָה: properly, a weakening; figuratively, alleviation, i.e. cure KJV:healing.
Meanings: Brown-Driver-Briggs (1906) and Strong's Hebrew Dictionary (1890), public domain, via the Open Scriptures Hebrew Bible Project (CC BY 4.0). TWOT numbers for reference only.
Root family 957: כָּהָהkāhâ — be, grow dim, faint; grow faint; be weak, despond, rebuke, grow dull; darken, be dim, fail, restrain