Choose the perfect synonym or antonym for the word

Hollow

/ˈhɒləʊ/

An empty space inside something solid or the lack of substance or meaningfulness.

Synonyms:

The tree trunk was hollow inside.Her words felt hollow and didn't reassure me.

Derived from Middle English holow, from Old English holh (cave, cavity), related to Proto-Germanic *hulô (hole).

15 mentions per 1 million words

Moderate

Hint: Frequency according to COCA