興る is read as おこる (okoru) and means to rise.
おこる
okoru
きょうじる
to amuse oneself
きょうがのる
to warm up to
きょうみをそそる
to arouse someone's interest
きょうがる
to be amused or interested in
きょうずる
きょうざめる
to lose interest
きょうがさめる
to have one's fun spoiled
きょうみ
interest (in something)
こうふん
excitement
おこす
to establish (e.g. a company)
きょうみぶかい
very interesting
きょうみしんしん