小腹 is read as こばら (kobara) and means belly.
こばら
kobara
こばらがすく
to become a little hungry
こばらがたつ
to be slightly offended
しょうべん
breaking a contract
しょうせつ
novel
こゆび
little toe
しょうすうてん
decimal point
こにんず
small number of people
こうじ
lane
こきみいい
delightful
こいし
pebble
しょうすう
fraction (part of)
しょうせつか
novelist