IPA: /hjuˈmɪdər/
KK: /hjuˈmɪdɔr/
A special container used to keep cigars or tobacco at the right level of moisture.
He stored his expensive cigars in a humidor to keep them fresh.
Humidor is formed from "humor" (from Latin "humor", meaning moisture or liquid) and "-dor" (a suffix used to denote a place or container). The word refers to a container designed to maintain a certain level of moisture, particularly for storing cigars or tobacco.
Think of 'moisture' ('humor') being kept in a special 'container' ('-dor') — that's what a humidor does.