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Resistant

From Boercade

resistant = re + sist + ant

re-: against

sist: derived from Latin "sistere", meaning "stand"

-ant: of doing something

So resistant means: 

Of standing against.

Evolution of usage

The virus becomes more of standing against to medicine than before.

=>

The virus becomes more of resisting to medicine than before.

=>

The virus becomes more resistant to medicine than before.

Virus resistance.jpg

Related vocabulary

Vocabulary
resist
resistless
resistor
resistant
resistance
resistible
irresistible