Blithe vs Dilate - What's the difference?

As an adjective blithe

is dated or literary Happy, cheerful.

to enlarge; to make bigger.

(er)

(dated or literary) Happy, cheerful.

Indifferent, careless, showing a lack of concern.

She had a blithe disregard of cultures outside the United States.

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(dilat)

To enlarge; to make bigger.

The eye doctor put drops in my eye to dilate the pupil so he could see the nerve better.

To become wider or larger; to expand.

His heart dilates and glories in his strength.

(ambitransitive) To speak largely and copiously; to dwell in narration; to enlarge; with "on" or "upon".

* Shakespeare

Do me the favour to dilate at full / What hath befallen of them and thee till now.

* Crabbe

But still on their ancient joys dilate .

* dilatability * dilatable * dilation * dilative