IPA: //riˈtreɪn//
KK: /riˈtreɪn/
To provide training again to someone or something, often to improve skills or knowledge that may have been lost or to learn new methods.
After changing careers, she had to retrain to gain the necessary skills for her new job.
Past: retrained
Past Participle: retrained
Retrain → It is formed from "re-" (meaning again) and "train" (from Old French *traïner*, meaning to draw or pull). The word "retrain" means to draw or pull back again, specifically in the context of teaching or training someone anew.
Think of 'training' someone 'again' — 're-' means again, and 'train' means to teach or develop skills.