侵入|しんにゅうshinnyuu[0]heiban (flat)

1. noun, suru verb, intransitive verbinvasion; incursion; raid; aggression; intrusion; trespass; penetration; hacking
   「ピッキングの道具どうぐ無なしで、どうやって侵入しんにゅうした？」「トイレの窓まどがあいた」↗

   "With no picks how did you break in?" "The toilet window was open."

• Synonym侵略しんりゃくWrittenWritten/formal: invading another country's territory or sovereignty, as in 「侵略戦争」; large in scale and strongly political.
• Synonym侵攻しんこうWrittenWritten/formal: troops attacking into another country, as in 「隣国に侵攻する」; specifically a military operation.
• Synonym攻め込むせめこむNeutralCharging into the enemy's position, as in 「敵陣に攻め込む」; also used for going on the attack in a game or match.
• Synonym侵すおかすWrittenKun-reading verb for violating or encroaching, as in 「国境を侵す」; shares the kanji with Sino-Japanese 「侵入」 but is more written/formal.
• Synonym闖入ちんにゅうWrittenWritten/formal: bursting in suddenly, as in 「闖入者」; suggests an uninvited intruder.
• Synonym攻め入るせめいるNeutralAttacking into enemy territory; used less often than 「攻め込む」.
• Synonym討ち入るうちいるWrittenWritten/formal: storming an enemy's residence, as in the Ako ronin's 「討ち入り」; has a historical flavor.
• Related侵犯しんぱんWrittenWritten/formal: violating airspace or rights, as in 「領空侵犯」; stresses crossing a line.
• Related来襲らいしゅうWrittenWritten/formal: an enemy or typhoon coming to attack, as in 「敵機来襲」; stresses arriving from outside.
• Related攻略こうりゃくNeutralCapturing enemy territory, or tackling games and puzzles, as in 「ゲーム攻略」; in modern usage mostly the latter.
• Related侵食しんしょくWrittenGradual erosion, as in 「海岸の侵食」; eating away little by little.
• Related立ち入るたちいるNeutralEntering a place, often in 「立入禁止」; also meddling in private matters, not necessarily illegal.
• Related占領せんりょうNeutralOccupying territory or hogging a space, as in 「席を占領する」; the point is holding the place.
• Related侵害しんがいWrittenWritten/formal: infringing rights or interests, also intruding on or eroding another's land, as in 「人権侵害」; stresses the harm done.
• Related占拠せんきょWrittenWritten/formal: occupying a building or site, as in 「不法占拠」; seizing and holding it by force.
• Related乱入らんにゅうNeutralBarging in roughly or unreasonably, alone or in a crowd, as in 「ステージに乱入する」.
• Related押しかけるおしかけるNeutralTurning up uninvited or swarming in, as in 「記者が押しかける」; suggests a crowd descending.
• Related割り込むわりこむNeutralCutting into a line or a conversation, as in 「列に割り込む」; squeezing into a gap.
• Related襲来しゅうらいWrittenWritten/formal: an outside enemy or disaster sweeping in; close to 「来襲」 but more solemn.
• Related侵襲しんしゅうWrittenWritten/formal: pathogens or disasters striking, as in 「侵襲性」; mainly a medical term.
• Related入寇にゅうこうWrittenA formal, archaic word for a foreign enemy invading; found mostly in historical accounts.
• Related蚕食さんしょくWrittenWritten/formal: encroaching step by step like a silkworm eating mulberry leaves; metaphorical.
• Antonym退去たいきょWrittenAntonym. Written/formal: leaving or vacating a place, as in 「退去命令」; the opposite of entering without permission.
• Antonym撤退てったいNeutralAntonym. Withdrawing or pulling out; the opposite of pushing in.

Use 「侵入」 for entering a place or system without permission, as in 「住居侵入」 or 「不正侵入」. To invade another country say 「侵略」; for troops attacking in, 「侵攻」; for violating rights, 「侵害」. The opposites are 「退去」 and 「撤退」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. ある領域りょういきを管理かんりしている者ものの許ゆるしを受うけず、その領域りょういきに不法ふほうに入はいること。