late Middle English: from medieval Latin objectum ‘thing presented to the mind’, neuter past participle (used as a noun) of Latin obicere, from ob- ‘in the way of’ + jacere ‘to throw’; the verb may also partly represent the Latin frequentative objectare
ラテン語のobicereの中性過去分詞で、ob-「~の方法で」+jacere「投げる」から来ている; この動詞はラテン語の頻出語objectareを一部表すこともある。