• (a.) Destroying, or tending to destroy, one`s self or itself; rucidal.
Self`-de·struc'tive adjective Destroying, or tending to destroy, one's self or itself; rucidal. 
[adj] - dangerous to yourself or your interests
suicidal adjective dangerous to yourself or your interests; `suicidal impulses`; `a suicidal corporate takeover strategy`; `a kamikaze pilot`