Merriam-Webster Collegiate Dictionary - suicide

 I. noun  Etymology: Latin sui (genitive) of oneself + English -cide; akin to Old English & Old High German sin his, Latin suus one's own, sed, se without, Sanskrit sva oneself, one's own  Date: 1643  1.  a. the act or an instance of taking one's own life voluntarily and intentionally especially by a person of years of discretion and of sound mind  b. ruin of one's own interests political ~  c. apoptosis cell ~  2. one that commits or attempts ~  II. adjective  Date: 1773 of or relating to ~; especially being or performing a deliberate act resulting in the voluntary death of the person who does it a ~ mission a ~ bomber  III. verb  (~d; suiciding)  Date: 1841  intransitive verb to commit ~  transitive verb to put (oneself) to death