overthink

verb3

1. •
   To think or analyze too much.

   • Don't overthink the problem. It's not that difficult.
2. •
   (rare) To think too highly (of); overestimate

   • So to think of self as not to overthink — to think of yourself with sober, moral judgment. — 1859
3. •
   (no longer used) To think about; think over

   • But when I dred that wou'd not work, I overthought me of a Wile How I might at my leisure lurk, My graceless Guardain to beguile. — 1695