あのカジノはイカサマだ。
That casino is rigged.
He was famous as a swindler.
Only with reading いかさま
Archaic emphatic adverb or interjection expressing strong affirmation. Restricted to the hiragana reading いかさま.
In an old novel it says, 'Indeed, that is exactly so.'
いかさま usually refers to cheating in games, gambling, or contests, whereas 詐欺 covers fraud in a broader, often financial or legal sense.
Usually written in kana; the kanji form 如何様 is rare and archaic.
Katakana spelling is common in informal writing and manga.
Rare kanji spelling; mostly historical or literary.
Derived from 如何 (いか, 'how') + 様 (さま, 'state/appearance'), originally meaning 'in what way' or 'how'. The shift to 'fraud' likely came from the idea of something being not what it seems. The archaic emphatic use is a direct extension of the original meaning.