The quality or state of being completely perfect and free from any mistakes or defects.
From 'faultless' plus the '-ness' suffix. This is a three-layer construction: 'fault' + '-less' + '-ness', showing how English can stack multiple suffixes. Both '-less' and '-ness' are among the most productive suffixes in the language.
This word demonstrates English's incredible building capacity—we can keep adding suffixes to create more specialized meanings! It's like architectural scaffolding: the core 'fault' can support layers of meaning. In casual speech, we'd probably just say 'perfection', but 'faultlessness' allows for precise technical use.
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