IPA: /dɪˈraɪdə/
KK: /dɪˈraɪdər/
A person who makes fun of someone or something in a mocking way.
The derider laughed at the artist's work, not realizing the effort that went into it.
Derider is formed from 'de-' (meaning down or away) and 'ridere' (meaning to laugh). The word describes someone who laughs down at others, often in a mocking or scornful manner.
Think of someone who laughs 'down' ('de-') at others, which helps you remember that a derider is someone who mocks or ridicules.