IPA: /ˈlaɪt.fəl/
KK: /ˈlaɪt.fəl/
Having a lot of light; bright and cheerful.
The lightful room made everyone feel happy and energized.
This word originates from Old English, where 'light' (meaning not heavy or bright) is combined with '-ful' (meaning full of). The word 'lightful' means full of light or brightness.
Think of 'light' as something that is bright and 'full of' — that's why 'lightful' means full of light.