IPA: /ˈdoʊltɪʃli/
KK: /ˈdoʊltɪʃli/
In a way that shows a lack of intelligence or understanding; foolishly.
He doltishly agreed to the plan without thinking it through.
Doltishly → It is formed from "dolt" (from Middle English *dolt*, meaning a dull or stupid person) and the suffix "-ishly" (meaning in a manner of). The word "doltishly" means in a manner that is characteristic of a dull or stupid person.
Think of someone acting in a 'dull' way — 'dolt' refers to a stupid person, and '-ishly' indicates the manner of that behavior.