MASTERLY
consummate, masterful, masterly, virtuoso
(adjective) having or revealing supreme mastery or skill; “a consummate artist”; “consummate skill”; “a masterful speaker”; “masterful technique”; “a masterly performance of the sonata”; “a virtuoso performance”
Source: WordNet® 3.1
Etymology 1
Adjective
masterly (comparative more masterly, superlative most masterly)
Executed in the manner of a master; showing competence and skill; masterful.
Synonyms: maestrolike, masterlike, masterous (obsolete), Thesaurus:skilled
(usually, derogatory, obsolete) Like a master; arbitrary; domineering, imperious.
Synonyms: despotic, overbearing
Etymology 2
Adverb
masterly (comparative more masterly, superlative most masterly)
(archaic) In a masterful manner; competently, masterfully.
Synonyms: expertly, skilfully
Source: Wiktionary
Mas"ter*ly, a.
1. Suitable to, or characteristic of, a master; indicating thorough
knowledge or superior skill and power; showing a master's hand; as, a
masterly design; a masterly performance; a masterly policy. "A wise
and masterly inactivity." Sir J. Mackintosh.
2. Imperious; domineering; arbitrary.
Mas"ter*ly, adv.
Definition: With the skill of a master.
Thou dost speak masterly. Shak.
Source: Webster’s Unabridged Dictionary 1913 Edition