侵入する
解説 Definition
intruding は intrude（侵入する、立ち入る）の現在分詞・動名詞です。物理的に入り込む場合だけでなく、許可なく他人の場所や時間に入り込む意味でも使われます。
Entering or becoming involved in a place, situation, or another person’s affairs without permission or invitation. This is the present-participle or gerund form of intrude and can describe an action in progress or the action as an activity.
覚え方のコツ Memory Tip
原形 intrude「許可なく入り込む」の語末 e を落として -ing を付けた現在分詞・動名詞で、発音は /ɪnˈtruːdɪŋ/。in-「中へ」と「押し込む」という成り立ちを意識し、intruding into a restricted area や intruding on someone's privacy のような無断侵入の場面で覚えます。
Start with intrude, “to enter or interfere without permission.” To form intruding, drop the final silent e and add -ing; it is pronounced /ɪnˈtruːdɪŋ/. The word’s history suggests pushing inward, which fits both a stranger entering a restricted area and someone interfering in another person’s private time or affairs. Learn it with its usual prepositions: intruding into a place emphasizes unauthorized entry, while intruding on someone’s privacy or conversation emphasizes unwanted interference. The central idea is crossing a boundary where one has not been invited or allowed.
例文
A stranger was intruding into the restricted area.
見知らぬ人が立入禁止区域に侵入していました。
The guard stopped two people intruding through the side gate.
警備員は、脇の門から侵入していた二人を止めました。
They installed cameras to prevent anyone from intruding at night.
彼らは夜間の侵入を防ぐためにカメラを設置しました。
intruding の類義語・関連語
intruding の語源・成り立ち Etymology
intruding は intrude に -ing が付いた形で、intrude はラテン語 intrudere（in-「中へ」+ trudere「押し込む」）に由来します。もとは「中へぐいと押し入れる」で、そこから「勝手に入り込む、侵入する」へ発展しました。extrude や protrude も同じ trudere の仲間です。
Intruding is formed from intrude by dropping its final e and adding -ing. Intrude comes through Latin intrudere, built from in-, “into,” and trudere, “to thrust or push.” Its literal image is therefore that of pushing inward, which developed into the senses of entering without permission and interfering where one is unwelcome. Extrude and protrude preserve the same Latin verb root with different prefixes.
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