IPA: /ˈtɪəfəl/
KK: /ˈtɪrfl/
Having tears in the eyes or expressing sadness; often used to describe someone who is crying or about to cry.
She gave a tearful goodbye to her friends at the airport.
Tearful → It is formed from "tear" (from Old English *tǣr*, meaning a drop of clear salty liquid produced by glands in the eyes) and "-ful" (meaning full of). The word "tearful" means full of tears or characterized by tears.
Think of someone who is 'full of tears' — that's what 'tearful' means.