Solution

SOLIDLY

2 clues

Firmly

Word class: Adverb
Nature of clue: Synonym
Difficulty: Very easy
Topics: Materials

Other solutions to Firmly

Sturdily

Word class: Adverb
Nature of clue: Synonym
Difficulty: Easy
Topics: Materials

Other solutions to Sturdily

RUGGEDLY

Words are categorized by artificial intelligence: there can be mistakes.