The abstract noun form for the verb to displease is displeasure.
Displease.
you are not pleased, unhappy
yes she is skillful
skillful
The British spelling of skillful is skillful in a British accent
Inept is the opposite/antonym of skillful.
Skillfully is the adverb form of skillful.
The comparative form of "skillful" is "more skillful" and the superlative is "most skillful."
The British speak and use the English language so it would be spelled as skillful.
I/We/You/They have displeasedHe/She/It has displeased
No, it is a noun. It is related to the verb "to displease."