hand/arm to help, aid 2 realizations
ACCEPTED Realization 1
type Derivation
language Classical Arabic
lexeme 1 sāʕid-
lexeme 2 sāʕada
meaning 1 fore arm šadda l-lāhu ʕalā s-sāʕid-i-ka 

May God strengthen your fore arm!

direction
meaning 2 to aid, assist, help sāʕadahu ʕalayhi 

He helped him to do it.

reference Lane: 1360-1362
comment
ACCEPTED Realization 2
type Derivation
language Classical Arabic
lexeme 1 ʕaḍud-
lexeme 2 ʕaḍada
meaning 1 upper arm, upper half of the arm
direction
meaning 2 to assist, to aid
reference Lane: 2071-2072
comment Cf. also ʕaḍud- 'assistant, aider' (Lane 2072) - polysemous with 'arm'.