Run down and Summate

Run down verb - To come upon after searching, study, or effort.

Summate and run down are semantically related In some cases you can use "Summate" instead a verb "Run down".

Summate verb - To combine (numbers) into a single sum.

Run down and summate are semantically related in calculate topic. Sometimes you can use "Run down" instead a verb "Summate", if it concerns topics such as give a rundown.