IPA: /ˈtɪəfəli/
KK: /ˈtɪr.fəl.i/
In a way that shows or expresses tears or sadness.
She spoke tearfully about her lost pet.
Tearfully → It is formed from "tear" (from Old English *tēar*, meaning a drop of clear salty liquid) and "-fully" (meaning in a manner full of). The word "tearfully" means in a manner full of tears or crying.
Think of 'tear' as a drop of liquid from the eyes, and '-fully' means in a manner full of that emotion. This helps you remember that 'tearfully' describes doing something while crying.