Learn how to say Diminish correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word diminish:
make or become less:
the new law is expected to diminish the government’s chances
the pain will gradually diminish
[with object] cause to seem less impressive or valuable:
the trial has aged and diminished him
(the law of) diminishing returns
used to refer to a point at which the level of profits or benefits gained is less than the amount of money or energy invested.
late Middle English: blend of archaic minish ‘diminish’ (based on Latin minutia ‘smallness’) and obsolete diminue ‘speak disparagingly’ (based on Latin deminuere ‘lessen’ (in late Latin diminuere), from minuere ‘make small’)