intelligence is the ability to gain and apply knowledge and skills.
this word is related to a Russian word "intelligentsia", which is in fact derived from a Latin root,
Intelligentsia (N): intellectuals or highly educated people; the intellectual elite of a society.
the word intelligence can be split as "inter" which means ‘between’ + "legere" which means to ‘choose, pick out, read’;so an intelligent person has an ability to choose in between things, he can discern well.
Contextual example:
If you are intelligent, then you have a chance to be a part of intelligentsia.
cognates of this word are:
Legible (adj):
clear enough to read (here the verb root has meaning to read)
Contextual example:
I was not able to grade your homework as your handwriting is not legible.
Regards,
V