Can you give me antonyms for these words?

can you give me antonyms for these words

1.absurd

2.classify

3.ensure

4.navigate

5.nestle

6.tart

7.avalanche

8.plea

9.principle

10.realistic

11.selective

12.securityCan you give me antonyms for these words?
1. absurd - certain, logical, rational, reasonable, sensible, wise.

2. classify - declassify.

3. ensure - endanger.

4. navigate - meander.

5. nestle - shun.

6. tart meaning bitter or tangy - sweet.

7. avalanche - trickle?

8. plea - order, command.

9. principle - trivial, unimportant.

10. realistic - impractical, irrational, unrealistic.

11. selective - undiscriminating, indiscriminating or inclusive.

12. security - insecurity, danger, peril.Can you give me antonyms for these words?
Navigate-deactivate

realistic-fiction