Rendirse means to surrender, tire out or give up.
This is a reflexive verb that actually makes sense to me. Rendir (without the se) means to conquer, overcome, tire out (them not me) or to produce.
If one is doing it to themselves they are surrendering or giving up. If one is doing it to someone else they are conquering or overcoming.
Rendition=surrender(Webster’s)or,to give up.Al-Qaida types were given up to other countries, after capture by U.S. forces.