How to Say "expertly" in Spanish
The Spanish word for “expertly” is “técnicamente” — C1 level.
English → SpanishC1
adverbC1
in a professional manner

Examples
El cirujano ejecutó la operación técnicamente de manera impecable.
The surgeon executed the operation technically in an impeccable manner (skillfully).
Aunque la obra no tiene pasión, está técnicamente muy bien pintada.
Although the work lacks passion, it is technically (skillfully) very well painted.
Describing Action
In this sense, 'técnicamente' tells you how an action was performed, usually related to precision, craft, or professional standards.
Related Translations
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