*sent-

The core idea of this root was:

going in a direction, heading

It’s the origin of to send which is essentially “make go in a direction”, but arguably the more interesting branch is the one around sense, sensible and the German der Sinn, which evolved from the idea of mentally going in a direction.
Other words that also belong here:

• consent, consensus (“having the same mental direction”)
• dissent (“going in a different direction”)
• resent (“going in a bad direction”)
• sensation
• sensor
• scent
• sensibility
• …