Devotement

de·vote  (d-vt)

tr.v. de·vot·ed, de·vot·ing, de·votes

1. To give or apply (one's time, attention, or self) entirely to a particular activity, pursuit, cause, or person.

2. To set apart for a specific purpose or use: land devoted to mining.

3. To set apart by or as if by a vow or solemn act; consecrate: a temple devoted to Apollo.

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[Latin dvovre, dvt-, to vow : d-, de- + vovre, to vow.]

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de·votement n.

Synonyms: devote, dedicate, consecrate, pledge
These verbs mean to give to a particular end and especially to a higher purpose. Devote implies faithfulness and loyalty: Nurses devote themselves to the care of the sick.
Dedicate connotes a solemn, often formal commitment: "To such a task we can dedicate our lives and our fortunes" (Woodrow Wilson).
Consecrate suggests sacred commitment: His entire life is consecrated to science.
To pledge is to back a personal commitment by a solemn promise: "I pledge you, I pledge myself, to a new deal for the American people" (Franklin D. Roosevelt).