restrengthen
verb[IorT]
(alsore-strengthen)uk/ˌriːˈstreŋ.θən/usto make someone or somethingstrongagain, or tobecomestrongagain:
Try theseexercisesto re-strengthenyourknees.
Thestormcould restrengthen as itmovesaway from thearea.
- Thecontainersare verystrong, but if youcutthem, you may need toaddstripsofmaterialto re-strengthen them.
 - Thisherbalpreparationwill re-strengthen the Qienergyinyourbody, giving you morevitalityinyourdailylife.
 - Thestormisforecasttoweakenbrieflyand then restrengthen over the Gulf of Mexico.
 
Becoming and making stronger
- aggrandize
 - boil up
 - bolster
 - cement
 - character-building
 - deepen
 - fortify
 - harden
 - hardening
 - invigoration
 - jell
 - reinforcement
 - restoke
 - sharpen
 - solidification
 - solidify
 - soup
 - soupsomethingup
 - stiffen
 - wired