threaten someone with what appears to be a kitchen knife

what appears to be a gun
銃と思われる［のような］もの

discover what appears to be human remains
人骨［人間の遺体］らしきものを発見する

pour what appears to be kerosene on the floor
灯油らしきものを床にまく

threaten someone with what appears to be a kitchen knife
包丁らしきもので（人）を脅す

break into ~ armed with what appears to be a hunting gun
猟銃らしきもので武装して～に押し入る

start smoking out of adoration for what appears to be an adult habit
大人の習慣と思われるものへの憧れから喫煙を始める