sturdier
stur-di-er
adjective
More robust, strong, or well-built; less likely to break or fall apart.
"This new fence is sturdier than the old one."
Thesaurus
Synonyms: hard-line, inflexible, uncompromising, sturdy, hardline, tough, rugged, stout, stalwart, hardy, robust
Antonyms: compromising, conciliatory, flexible