IPA: //riːˈsiːk//
KK: /ri'sik/
To look for something again after having already searched for it before.
After losing my keys, I had to reseek them in the same places I had looked earlier.
Past: researched
Past Participle: researched
Reseek is formed from "re-" (meaning again) and "seek" (from Old English "sēcan", meaning to search for or look for). The word "reseek" means to search for something again.
Think of searching for something 'again' ('re-') — that's why 'reseek' means to seek again.