Which word relates closely to being highly skilled or perfected in a trade or art?

The word that closely relates to being highly skilled or perfected in a trade or art is "consummate." This term describes not only someone who has achieved a high level of proficiency but also someone whose skills are so refined that they are considered the best in their field. The connotation of "consummate" also implies a sense of completeness and totality in skill, suggesting that the individual has mastered their craft to an exceptional degree.

In contrast, the other words do not convey this idea of mastery. “Chicanery” refers to deception or trickery, particularly in legal matters. “Obstinate” describes someone who is stubbornly refusing to change their opinion or chosen course of action, indicating a lack of flexibility rather than skill. “Equivocal” relates to ambiguous or unclear language and does not have any connection to proficiency or mastery of a skill. Thus, the choice of "consummate" accurately embodies the quality of being highly skilled or perfected.