自死 is read as じし (jishi) and means apoptosis.
じし
jishi
じこうし
suicidal ligature strangulation
しぜんし
(dying of) natural causes
じしいぞく
suicide survivor (i.e. family member of someone who has committed suicide)
じしいじ
child who has survived the suicide of a parent
じゆうかしか
give me liberty, or give me death
かろうじし
suicide brought on by excessive overwork
じでんしゃ
bicycle
じぶん
you
みずから
oneself
じしゅ
independence
じどう
automatic
じこく
one's own country