1. part. (literary) not (used alone to negate a verb; now chiefly with only a few particular verbs: see usage notes)
2. part. not, no (used before a verb, with a coordinating negative element usually following; see Usage Notes, below)
3. part. (Used in a subordinate clause before a subjunctive verb (especially when the main verb expresses doubt or fear), to provide extra overtones of doubt or uncertainty (but not negating its verb); the so-
4. part. In comparative clauses usually translated with the positive sense of the subsequent negative
Apprendre le français est plus facile qu'on ne pense. - Learning French is easier than you (might) think.
pense
1. v. first-person singular present of penser
2. v. third-person singular present of penser
3. v. second-person singular imperative of penser
penser
1. v. to think, reflect, concentrate one's mind on something
Penser tout haut. - Think aloud, speak one's mind freely.
2. v. to estimate, imagine, believe
Vous n'en êtes pas où vous pensez. - You are not where you think you are.
Il y a, je pense, dix kilomètres de chez vous chez moi. - It is ten kilometres, I estimate, from your place to my place.
pas
1. n-m. step, pace, footstep
2. n-m. (geography) strait, pass
Pas de Calais - Strait of Dover
3. n-m. thread, pitch (of a screw or nut)
4. adv. The most common adverb of negation in French, typically translating into English as not, don't, doesn't, etc.