IPA: /ˈfɔːltiər/
KK: /ˈfɔltiər/
More defective or imperfect than something else.
The new model is faultier than the previous version, leading to more issues.
Comparative: faultier
Superlative: faultiest
The word 'faultier' comes from Old French 'faillir' (meaning to fail or to err) and the suffix '-ier' (meaning one who). Thus, 'faultier' refers to one who fails or makes mistakes.
Think of someone who 'fails' ('faillir') — that's why 'faultier' means a person who makes mistakes.