Stagnate vs Tarnish - What's the difference?

As verbs the difference between stagnate and tarnish

is that stagnate is to cease motion, activity, or progress: while tarnish is to oxidize or discolor due to oxidation.

oxidation or discoloration, especially of a decorative metal exposed to air.

(en-verb)

To cease motion, activity, or progress:

# To cease to flow or run.

If the water stagnates , algae will grow.

# To be or become foul from standing.

Air stagnates in a closed room.

# To cease to develop, advance or change; to become idle.

#* (rfdate), Walter Scott:

Ready-witted tenderness never stagnates in vain lamentations while there is any room for hope.

#* 2003 , Ernest Verity, Get Wisdom (ISBN 1591606691), page 434:

Listening to what others say, especially to what they teach, prevents our minds stagnating , thus promoting mental growth into old age.

* stagnant * stagnation

(-)

Oxidation or discoloration, especially of a decorative metal exposed to air.

(es)

To oxidize or discolor due to oxidation.

Careful storage of silver will prevent it from tarnishing .

To soil, sully, damage or compromise

He is afraid that he will tarnish his reputation if he disagrees.

(figurative) To lose its lustre or attraction; to become dull.

* Dryden

Till thy fresh glories, which now shine so bright, / Grow stale and tarnish with our daily sight.