معنی کلمه perceive

to be or become aware of (something)

to understand --- to realize

become aware or conscious of (something); come to realize or understand. "his mouth fell open as he perceived the truth"

synonyms: discern, recognize, become cognizant of, become aware of, become conscious of, get/come to know, tell, distinguish, grasp, understand, take in, make out, find, identify, hit on, comprehend, apprehend, figure out, deduce, conclude, see, discover, learn, appreciate, realize, ascertain, sense, divine, intuit

interpret or regard (someone or something) in a particular way. "if Guy does not perceive himself as disabled, nobody else should"

synonyms: look on, view, regard, consider, think of, judge, deem, appraise, assess, adjudge, figure (out), size up, value, rate, suppose, think, sum up, weigh up "he was perceived as too negative"

I cannot always be perceived by the naked eye.

We tend to perceive what we expect to pereive.

He couldn't perceive any difference between the twins.

There are wavelenghts of light that the human eye cannot perceive.

comprehend-discover

to understand or think of something or someone in a particular way

formal: to notice, see, or recognize something
→perceptive

In the first example, it should be "major differences", not "major differenced".