overthinker
nounUK /ˌəʊvəˈθɪŋkə/
US /ˌoʊvərˈθɪŋkər/
A person who thinks about things too much and worries a lot.
My sister is such an overthinker that she plans every detail of a trip weeks in advance.
RELATED WORDS
OTHER MEANINGS
2. Someone who keeps replaying past conversations in their head.
As an overthinker, he stayed up all night wondering if he had said the wrong thing.
3. A person who struggles to make small decisions because they weigh every option.
The overthinker spent ten minutes choosing between two nearly identical pens.
4. Someone who imagines worst-case scenarios before they happen.
Her friends tease her for being an overthinker whenever a text goes unanswered for an hour.