It is anyhow a word misspelled, so if refers to the passive participle of fade, fade, as if refers to the 3rd person singular of the simple past perfect of indicative of the same verb, pronominal character that often and it means dispel, making disappear something objective by dispersion of their parties, or make disappear from the mind of someone an idea image or memory also delete, blur, evaporate and faint, lose the sense, get dizzy, faint, vanish, esfuminar is, dissipate.
