redoubtable

redoubtable can be re+doubt(able)..so if you have REpeated DOUBTs in any subject just before the exam, it might CAUSE FEAR

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it can be splitted like re+doubt+able considering which can show that the thing which is able to create doubt again and again.and those things always create fear..

Someone who is ABLE to READ your DOUBTS without you even expressing them is awe-inspiring and worthy of honor.

Means REpeated-Doubts that one cannot answer, and it causes fear. Likewise,one who can clear all the doubts at a shot is highly worthy & respectable (sec meaning)

we FEAR and think to RE-DOUBT on a respectABLE person

Sounds like <B>red audible</B>. A quarterback that is confident enough to call audibles is deserving of respect/honor. Also, audibles are sometimes used as an intimidation factor, or in other words to stir a slight fear.

REDOUBTABLE - worthy of respect and honor. It sounds like - RED OUT TABLE , only people who are worthy of respect were invited to dine in the RED TABLE THAT IS OUT.

Re + Doubt able >> If some is in re and re doubt passing in some subject, it creates a fear in exam about that subject