self-annihilation self-annihilation /sɛlf əˌnaɪəˈleɪʃən/

noun

1. The act of killing yourself  ( self-annihilation , self-destruction , suicide )
   the act of killing yourself
    It is a crime to commit suicide
   it is a crime to commit suicide
   
   

 histology histology /hɪˈstɑːlədʒi/

noun

1. () The branch of biology that studies the microscopic structure of animal or plant tissues  ( histology )
   the branch of biology that studies the microscopic structure of animal or plant tissues
    During his medical training, he took a year-long course in histology.
   During his medical training, he took a year-long course in histology.
   
   

 naif naif /naɪˈiːf/

adjective

1. Marked by or showing unaffected simplicity and lack of guile or worldly experience  ( naif , naïf , naive )
   marked by or showing unaffected simplicity and lack of guile or worldly experience
    A teenager's naive ignorance of life
   a teenager's naive ignorance of life
    The naive assumption that things can only get better
   the naive assumption that things can only get better
    This naive simple creature with wide friendly eyes so eager to believe appearances
   this naive simple creature with wide friendly eyes so eager to believe appearances
   

noun

1. A naive or inexperienced person  ( naif , naïf )
   a naive or inexperienced person
    Despite being in the bustling city, the naif from the small village looked at everything with wonder.
   Despite being in the bustling city, the naif from the small village looked at everything with wonder.
   
   

 desert desert /dɪˈzɝːt/

noun

1. () Arid land with little or no vegetation  ( desert )
   arid land with little or no vegetation
    The hot sun beat down on us as we hiked through the desert
   The hot sun beat down on us as we hiked through the desert
   
   
2. (usually plural) a person's deservingness of or entitlement to reward or punishment  ( desert )
   (usually plural) a person's deservingness of or entitlement to reward or punishment
   

verb

1. () Leave someone who needs or counts on you; leave in the lurch  ( desolate , abandon , forsake , desert )
   leave someone who needs or counts on you; leave in the lurch
    The mother deserted her children
   The mother deserted her children
   
2. () Desert (a cause, a country or an army), often in order to join the opposing cause, country, or army  ( defect , desert )
   desert (a cause, a country or an army), often in order to join the opposing cause, country, or army
    If soldiers deserted Hitler's army, they were shot
   If soldiers deserted Hitler's army, they were shot
   
3. Leave behind  ( desert )
   leave behind
    The students deserted the campus after the end of exam period
   the students deserted the campus after the end of exam period