what is word for this meaning? to laugh and speak about a person or idea in a way that shows that you think they are stupid or silly And what is the colloquial way to say it?

what is the difference? What is the difference between Insure, ensure and assure?

IN and ON I've already asked this question, but I did not get answers I wanted because I didn't have specific examples, (I'm not talking about location) my question is: Is there a rule about use of "in" and "on" ej: I'm very interested IN/ON speaking english I want to meet friends interested IN/ON practicing with me in/on a fromal basis. Thanks

help with statements Are these statements correct? I hope we can help us each other I hope we can help us mutually Thanks

Are this statements correct? I profit my time We profit our conversations

Maestro o tutor ¿Alguien puede decirme cual es la diferencia entre los tutores y los maestros profesionales?

accustume Do you know if I can use "accustom" like is used in spanish?

Old fahioned words A partner told me that the verb "bear" is old fashioned, is it right? and Is the verb "harness" currently used? or is a similar case?

Doubt A partner I have told me that the word "doubt" is not used in english as we do in spanish, I mean for instance, when we are in a class the teacher use to ask to the students "any doubt?" when he end up to explain any topic, my question is if I say I have a doubt with the meaning to the word "get" (I want to say that I don't know what the word mean or I don't understand it) is this correct?