IPA: /ˈsɛnsləsli/
KK: /ˈsɛnsləsli/
In a way that lacks meaning or purpose; without reason or logic.
He acted senselessly during the argument, making the situation worse.
Senselessly → It is formed from "sense" (from Latin "sensus", meaning perception or feeling) and the suffix "-less" (meaning without) and the adverbial suffix "-ly" (meaning in a manner). The word "senselessly" means in a manner that is without sense or reason.
Think of 'sense' as perception or feeling, and remember that 'senselessly' means acting in a way that lacks sense or reason.