The prefix pre- means “before,” so to premeditate means to think about a situation before you've jumped into it. If you've ever cooked a meal, you've premeditated the ingredients you need to get started.

Is there a word with 2 prefixes?

There are prefixes of time and order (pre-, post-), of location (sub-, super-), for expressing the reversing of an action (de-, dis-), and go on. Words of the latter types are, for example, unpremeditated or antidisestablishment. ...

Is premeditatedly a word?

adj. done with willful deliberation; planned in advance.