wash
The word 'laver' in French is a verb that means 'to wash'. It is used in a similar way as in English, such as 'laver les mains' (to wash hands), 'laver la vaisselle' (to wash dishes), or 'laver les vêtements' (to wash clothes). It can also be used in a more abstract sense, such as 'laver son honneur' (to wash one's honor), meaning to clear one's name or reputation.
I'm going to wash my hands.
This sentence uses the reflexive verb 'se laver' (to wash oneself). 'Me' is the reflexive pronoun that corresponds to 'I'. So 'Je vais me laver les mains' literally translates to 'I'm going to wash myself the hands'.
You must wash the fruits before eating them.
In this sentence, 'Il faut' means 'it is necessary to' or 'one must'. 'Avant de' is used to indicate an action that takes place before another, in this case, washing fruits before eating them.
She forgot to wash the dishes.
Here 'oublié de' is used to express forgetfulness to carry out an action. In this case, that action is to wash the dishes.