IPA: /ʌnˈplɛzəntnəs/
KK: /ʌnˈplɛzəntnəs/
A situation or experience that is not enjoyable or is uncomfortable.
The unpleasantness of the weather made it hard to enjoy the picnic.
Unpleasantness → It is formed from "un-" (meaning not) and "pleasant" (from Latin *placere*, meaning to please) and "-ness" (meaning the state of). The word "unpleasantness" refers to the state of not being pleasing or agreeable.
Think of 'not' ('un-') being combined with 'pleasing' ('pleasant') to remember that 'unpleasantness' means the state of being not pleasing.