Resembling or befitting a cad; dishonorable, ungentlemanly, or morally questionable.
From cad (an unscrupulous man) + -ish (adjective suffix meaning somewhat like). Cad itself may derive from cadet or from Romani influences.
Cadish perfectly captures Victorian-era judgment—it means someone isn't quite evil, just untrustworthy, a bit of a rogue, the kind of person mothers warned daughters about.
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