Whenever you use a ladder, you can either "climb up" or "climb down". But if you go to a library, sometimes you can see a ladder that can move sideways. In this case, can you say "climb sideways"?
No, we don't say "climb sideways" in a scenario like this. We only use "climb up" and "climb down." Ex: She had to climb up a steep hill. Ex: Climb down from there! You are going to get hurt.
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