iswas
Iswas is a term that may refer to the Arabic concept waswas, usually transliterated as waswas or waswasah in English. The word derives from the Arabic root w-s-w-s, which denotes whispering or insinuation. In transliteration, iswas can arise from attempts to render short vowels or from typographical variants; as such, it is not a standard scholarly spelling but may appear in some sources.
In Islamic theology, waswasah refers to the whisperings of Satan or intrusive doubts that aim to turn
Historically, commentators such as al-Ghazali and Ibn al-Qayyim discuss waswas as a spiritual trial affecting faith,
Because iswas is not a standardized English term, most reliable references spell it as waswas or waswasah.
See also: Satan, Qur’an, hadith, dhikr, nafs, shaitan, khannas.