即時|そくじsokuji[1]atamadaka (head-high)

1. no-adjective, adverbprompt; immediate; in real time
   彼かれは即時そくじ断行だんこうを強調きょうちょうした。↗

   He put emphasis on the necessity for immediate action.

• Synonym直ちにただちにNeutralMeans at once, without delay, and is often used in instructions and commands, as in 「直ちに避難してください」. 「即時」 mostly modifies nouns.
• Synonym即座そくざNeutralA noun, usually used as 「即座に」, for acting right there on the spot. 「即時」 leans toward the immediacy of systems and processing.
• Synonym即刻そっこくWrittenWritten style with a forceful, stern tone, as in 「即刻退去せよ」. 「即時」 is more neutral.
• Synonym即座にそくざにNeutralAn adverb for answering or acting on the spot, as in 「即座に答える」. 「即時」 works mainly as a noun modifier, as in 「即時対応」.
• SynonymたちまちNeutralDescribes a state changing in a blink or all at once; 「即時」 is formal and speaks of immediate handling or response.
• Synonym早速さっそくNeutralFor getting started without delay, as in 「早速始めましょう」; 「即時」 is the formal way to say immediate.
• SynonymすぐにNeutralThe everyday way to say right away; 「即時」 is the written, formal equivalent.
• SynonymすぐさまNeutralMeans at once with more force than 「すぐ」; 「即時」 is more formal.
• Synonym直にじきにCasualColloquial, read 「じきに」, for something happening before long; 「即時」 means this very instant.
• SynonymとっさにNeutralFor an instant, instinctive reaction, as in 「咄嗟に避ける」; 「即時」 is the formal word for immediate handling.
• SynonymすかさずNeutralFor following up without a beat of hesitation, as in 「透かさず反論する」; 「即時」 is a formal term.
• SynonymたちどころにWrittenWritten style for something done or taking effect on the spot, as in 「立ちどころに治る」. 「即時」 is more formal and typically appears as 「即時に」 or in compounds like 「即時払い」.
• Synonym時を移さずときをうつさずWrittenA written idiom for doing something at once without letting the moment slip; in everyday speech you would say 「すぐに」.
• RelatedすぐNeutralThe everyday default for right away, and it can also mean very close by; 「即時」 is the written, formal term.
• Related即時性そくじせいWrittenA noun for immediacy or timeliness, as in the 「即時性」 of news; 「即時」 denotes immediacy itself.
• RelatedてきめんWrittenFor an effect that shows before your eyes, as in 「効果覿面」; 「即時」 only says the timing is immediate.
• Related即そくNeutralA terse adverb for instantly, and also a word-building element in compounds like 「即決」; 「即時」 is more formal.
• Antonym後日ごじつNeutralAntonym: for another day or later on, the opposite of 「即時」.
• Antonym後刻ごこくWrittenWritten-style antonym meaning a little later, the opposite of 「即時」.
• Antonym後であとでNeutralThe everyday antonym: afterwards or in a while, the opposite of 「即時」.

「即時」 is the written, formal choice for immediacy of systems and processing, as in 「即時対応」. For instructions and commands say 「直ちに」; for acting on the spot say 「即座に」; in everyday speech 「すぐ」 covers most cases. 「咄嗟に」 is an instinctive flash, 「覿面」 an effect that shows at once, 「早速」 starting without delay, 「忽ち」 sudden change, and 「透かさず」 following up without hesitation. Written alternatives: 「立ちどころに」, stern 「即刻」, 「時を移さず」, and 「即時性」 for timeliness. Colloquial 「直に」 means before long. Opposites: 「後日」, 「後刻」, 「後で」.

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

1. すぐその時とき、すぐさま。
2. 短時間たんじかんで。