flexionar
to flex
verb flek-syoh-NAHR Rare
Origin: From Latin flexio (bending).
Also means
to bend
Usage Note
Flexionar means to bend a joint or to perform a flexion exercise — flexionar las rodillas (to bend the knees). In gym and physiotherapy contexts it is the standard verb; doblar is a more everyday synonym. The noun flexión (pl. flexiones) also means a press-up/push-up, a usage that often surprises English speakers.
Examples
"Debes flexionar las rodillas al agacharte."
Natural Translation
You should bend your knees when crouching.

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