perfectly
UK[ˈpɜːfɪktli]US[ˈpɜːrfɪktli]
adv
in a way that is completely correct or without any faults
adv
in a way that is completely suitable or appropriate
adv
used to emphasize what you are saying, especially when you are annoyed or angry
Morpheme Breakdown
perfect
ly
perfect
complete
ly
adverb suffix
Etymology
the word 'perfectly' is formed from the adjective 'perfect' and the adverbial suffix '-ly'. the root 'perfect' originates from the latin 'perfectus', the past participle of 'perficere', meaning 'to finish, to complete'. this verb itself is a compound of 'per-' (thoroughly) and 'facere' (to do, to make). the core semantic journey is from the literal sense of 'thoroughly made' or 'completed' to the abstract sense of 'flawless' or 'ideal'. the suffix '-ly', of germanic origin, was attached to adjectives to form adverbs, thus 'perfectly' literally means 'in a complete or flawless manner'.
Analysis
Structure: perfect (complete) + ly (adverb suffix)
perfect (from latin 'perfectus', meaning 'completed, finished', via old french 'parfit'), ly (from old english '-līce', an adverbial suffix)
Examples
the plan worked perfectly.
she was dressed perfectly for the occasion.
you know perfectly well what i mean.