From amad; literally, a foothold -- standing.
see HEBREW amad
H4613. moomad
מָעֳמָ֑ד noun [masculine] standing-ground, foot-hold Psalm 69:3 (in figurative).
עִמָּדִי see עִם below below עמם.
עמה (√ of following; compare Assyrian emû, be united, associated; emûtu, family, family connection; Late Hebrew עָמִית = Biblical Hebrew (rare)).