What's the difference between enclitic and proclitic?

Enclitic

Definition:

• (v. i.) Alt. of Enclitical
• (n.) A word which is joined to another so closely as to lose its proper accent, as the pronoun thee in prithee (pray thee).

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Proclitic

Definition:

• (a.) Leaning forward; -- said of certain monosyllabic words which are so closely attached to the following word as not to have a separate accent.

Example Sentences: