アシストashisuto

1. noun, suru verb, transitive verbassistance; help
2. noun, suru verb, transitive verb, sportsassist (final pass or cross before a goal)

• Synonym助力じょりょくWrittenWritten/formal: support lent in earnest requests or thanks, as in 「ご助力をお願いします」. 「アシスト」 is more colloquial and also covers sports assists and machine help.
• Synonym援助えんじょNeutralAid for people or groups in trouble — money, goods, technology — as in 「経済援助」「技術援助」. Weightier than 「アシスト」 and never used for a sports assist.
• Synonym支援しえんNeutralBacking activities from the side, as in 「被災地支援」「就職支援」; common in news and official writing. 「アシスト」 is more colloquial and also means a sports assist.
• Synonym応援おうえんNeutralSending help or cheering someone on, as in 「応援に駆けつける」 — encouragement and reinforcement; 「アシスト」 is assisting from the side.
• Synonym手伝うてつだうNeutralVerb for helping share someone's work or chores — the most common everyday choice. 「アシスト」 is a noun (with 「する」) with a loanword feel.
• Synonym手助けてだすけNeutralGiving a hand; largely interchangeable with 「アシスト」 for help by people or machines, but never used for a sports assist.
• Synonym補助ほじょNeutralSupplementing what is lacking — also subsidies, as in 「補助金」「補助輪」. 「アシスト」 is about helping a person do something from the side.
• Synonym力添えちからぞえFormalFormal: lending support, usually as 「お力添え」 in requests and thanks. 「アシスト」 carries none of that polite flavor.
• Synonym補佐ほさNeutralAssisting a person in charge at their side, also the post itself, as in 「課長補佐」. 「アシスト」 is not limited to aiding a superior.
• SynonymヘルプCasualColloquial loanword for help or a helper, also a call for help or a software help function. Not used for sports assists or machine assistance.
• Related加担かたんWrittenWritten: siding with a party and lending effort, often for wrongdoing as in 「犯罪に加担する」 — negative shade, while 「アシスト」 is neutral help.
• Related加勢かせいNeutralJoining one side to reinforce it, as in 「けんかに加勢する」 — the point is taking sides. 「アシスト」 just helps from the side, with no sense of picking sides.
• Related肩入れかたいれNeutralBacking or favoring one side, as in 「特定の候補に肩入れする」 — implies partiality. 「アシスト」 is concrete, hands-on help.
• Related救援きゅうえんNeutralRescuing people in crisis or disaster, as in 「救援物資」 — focused on emergencies. 「アシスト」 is for ordinary help with work.
• Related救済きゅうさいWrittenWritten and solemn: delivering sufferers from hardship, as in 「被害者救済」; also religious salvation. Far weightier than 「アシスト」.
• Related救助きゅうじょNeutralSaving people from danger, as in 「人命救助」 — about rescuing lives, far from 「アシスト」's sense of assistance or a sports assist.
• Related助けたすけNeutralEveryday native noun for help in general, also a helper person or thing, as in 「助けを求める」 — the most natural daily choice; 「アシスト」 leans to auxiliary support.
• Related扶助ふじょWrittenWritten: broad support and aid, as in 「相互扶助」, or state aid like 「公的扶助」 — welfare and legal usage; never a sports assist.
• Related一助いちじょWrittenWritten: a small contribution, used humbly as in 「…の一助となれば幸いです」. 「アシスト」 has no such modest nuance.
• Related介添えかいぞえNeutralAttending to and caring for someone at their side; also a bridesmaid, best man, or boxing cornerman. 「アシスト」 is usually work assistance or a sports assist.
• Related介助かいじょNeutralNursing term for helping sick, elderly, or disabled people with daily movements, as in 「入浴介助」. 「アシスト」 is not limited to care settings.
• Related助勢じょせいWrittenWritten and now rare: backing someone up or reinforcements. Everyday speech prefers 「加勢」 or 「手助け」, and it lacks 「アシスト」's sports-assist sense.
• Related幇助ほうじょWrittenLegal term for facilitating a crime, as in 「自殺幇助」; strongly negative. Ordinary helping or assisting is never called 「幇助」.
• Antonym妨害ぼうがいNeutralAntonym: obstructing or interfering with what others do, as in 「営業妨害」 — the opposite of 「アシスト」 helping things get done.

Use 「アシスト」 for sports assists, machine assistance, or general help. For everyday helping choose 「手伝う」 or 「手助け」; for supporting someone's activities 「支援」 or 「援助」; for nursing care 「介助」. 「妨害」 is the opposite — obstruction.

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

1. 補助ほじょ。支援しえん。