Pronunciation: [slˈa͡ɪdɪd] (IPA) 
The word "slided" is not a proper spelling in English. The appropriate past tense of slide is "slid" /slɪd/. The sound /d/ is added to the end of most regular verbs in the past tense; however, "slide" is an exception because it ends in an unvoiced consonant /d̪/. Adding the sound /d/ would create an extra syllable and change the pronunciation. Therefore, the correct spelling is "slid" regardless of how it sounds when spoken.
The word "slided" is the past tense and past participle form of the verb "slide".
The term "slide" originated from the Old English word "slīdan", which meant "to move smoothly or glide". The Old English term is related to the Old Norse word "slīða" and the Middle Low German word "slīden". All of these terms can be traced back to the Proto-Germanic word "*slīdaną".
The Proto-Germanic word has roots in the Proto-Indo-European root "*sleyd-", meaning "to slide or slip". This root can be seen in other related words, such as the Latin "glīdere" and the Greek "olízō", both meaning "to slide or slip".
