"backwards" in the adverb sense
1. back, backward, backwards, rearward, rearwards
at or to or toward the back or rear
"he moved back"
"tripped when he stepped backward"
"she looked rearward out the window of the car"
2. backward, backwards
in a manner or order or direction the reverse of normal
"it's easy to get the `i' and the `e' backward in words like `seize' and `siege'"
"the child put her jersey on backward"
Source: WordNet® (An amazing lexical database of English)
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