IPA: /ˌoʊvərˈθɪŋk/
KK: /oʊvərˈθɪŋk/
To think about something too much, often causing worry or confusion.
She tends to overthink every decision she makes.
Past: overthought
Past Participle: overthought
Overthink → It is formed from "over-" (meaning excessively) and "think" (from Old English "þencan", meaning to conceive in the mind). The word "overthink" means to think excessively or to dwell too much on something.
Think of the idea of thinking 'excessively' ('over-') about something — that's why overthink means to think too much.