Antonym

• INVOLUNTARYNATURALLY AND LACKING an INTENTION to ACT as one ACTS.
• NATURALLYEASILY AND NOT:without BECAUSE of being COMPELLED OR BECAUSE of PLANNING, OR USING A METHOD.

Hypernym

• INTENDDESIRE for what one BELIEVES to be a POSSIBLE:FEASIBLE FUTURE ACT by ONESELF.
  • DESIREGOOD FEELING IN-RELATION-TO ONESELF concerning the FUTURE HAVING, CONTROLLING, or ACTING:doing SOMETHING DEFINED.
    • FEELINGNATURAL REACTION IN one's MIND.
      • REACTCHANGE one's THINKING OR ACTING BECAUSE one is PERCEIVING something....

See also

• ARBITRARYLACK REASON IN CHOOSING OR DECIDING. 

Hyponym

• DEMONSTRATIVE　Be DELIBERATE in ACTING so as to SHOW one's ACT to OTHERS.

Modern Chinese Criteria

• Novyj objasnitel'nyj Slovar' Sinonimov Russkogo Jazyka ( APRESJAN 2004) p. 593

• Lateinische Synonyme und Etymologien ( DOEDERLEIN 1840) p.

  VOLUNTARY

  sponte refers to an action being undertaken voluntarily, on the agent's own free initiative.

  ultro refers to an action being undertaken in an over-ready manner.

  libenter adds to the notion of voluntariness the element of a positive feeling of pleasure on the part of the agent.

  voluntate emphasizes the act of will involved in the voluntary action.

• Handbook of Greek Synonymes, from the French of M. Alex. Pillon, Librarian of the Bibliothèque Royale , at Paris, and one of the editors of the new edition of Plaché's Dictionnaire Grec-Français, edited, with notes, by the Rev. Thomas Kerchever Arnold, M.A. Rector of Lyndon, and late fellow of Trinity College, Cambridge ( PILLON 1850) p. no.199