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“most unacceptable”
unacceptable (adjective), more unacceptable, most unacceptable
Liable to be disapproved of and not pleasing or welcome: Jack's behavior in school was so unacceptable, that he was not only sent to the principal's office, but was sent home immediately.
Floyd's handwriting was so unacceptable that Mrs. Thompson couldn't decipher it, so he had to do his homework again under his teacher's supervision.
This entry is located in the following units:
-able
(page 37)
cap-, cip-, capt-, cept-, ceive, -ceipt, -ceit, -cipient
(page 13)
-cede, -ceed, -cess, -cease
(page 7)