Strong's Concordance

Original word: σφυρόν
Transliteration: sphudron
Definition (short): ankles
Definition (full): the ankle

NAS Exhaustive Concordance

Word Origin: from sphuron (the ankle)
Definition: the ankle
NASB Translation: ankles (1).
NAS Exhaustive Concordance of the Bible with Hebrew-Aramaic and Greek Dictionaries.
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Strong's Exhaustive Concordance

Neuter of a presumed derivative probably of the same as sphaira (a ball, "sphere"; compare the feminine sphura, a hammer); the ankle (as globular) -- ancle bone.
KJV: And he took him by the right hand, and lifted him up: and immediately his feet and ancle bones received strength.
NASB: And seizing him by the right hand, he raised him up; and immediately his feet and his ankles were strengthened.