IPA: /ˈkɒmənˌsɛns/
KK: /ˈkɑːmənˌsɛns/
Relating to practical and sound judgment based on simple perception of the situation or facts.
It is commonsense to wear a coat when it is cold outside.
Commonsense → It is formed from "common" (from Old French *comun*, meaning shared by all) and "sense" (from Latin *sensus*, meaning perception or feeling). The word "commonsense" refers to a shared perception or understanding that is generally accepted by people.
Think of something that is 'shared by all' ('common') and relates to 'perception' ('sense') — commonsense is the understanding that everyone can agree on.