Definition of disappreciate in English:
disappreciate
Pronunciation /ˌdɪsəˈpriːʃɪeɪt/ /ˌdɪsəˈpriːsɪeɪt/
verb
To regard without appreciation; to consider as lacking in value; to undervalue.
Origin
Early 19th century; earliest use found in Noah Webster (1758–1843), lexicographer. From dis- + appreciate.