IPA: /ˌʌnəˈpriːʃəˌeɪtɪv/
KK: /ʌnəˈpriːʃəˌeɪtɪv/
Not feeling or showing gratitude or appreciation for something.
She felt unappreciative of all the hard work her team had done.
Unappreciative → It is formed from "un-" (meaning not) and "appreciative" (from Latin "appretiare", meaning to value or estimate). The word "unappreciative" means not valuing or recognizing the worth of something or someone.
Think of 'not valuing' ('un-') something that should be 'valued' ('appreciative'). This helps you remember that unappreciative describes a lack of recognition for worth.