forte (n.)

1640s, fort, from French fort "strong point (of a sword blade)," earlier "fort, fortress" (see fort). Meaning "strong point of a person, that in which one excels," is from 1680s. Final -e- added 18c. in imitation of Italian forte "strong."

forte (adj.)

music instruction, "loud, loudly," from Italian forte, literally "strong," from Latin fortis "strong" (see fort). Opposed to piano.

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Definitions of forte from WordNet
forte (n.)
an asset of special worth or utility;
cooking is his forte
Synonyms: strong suit / long suit / metier / specialty / speciality / strong point / strength
forte (n.)
a musical composition or musical passage to be performed loudly;
forte (n.)
the stronger part of a sword blade between the hilt and the foible;
forte (adv.)
used as a direction in music; to be played relatively loudly;
Synonyms: loudly
forte (adj.)
(used chiefly as a direction or description in music) loud; with force;
the forte passages in the composition
Synonyms: loud