後退（こうたい、koutai）
- retreat

The Japanese word 後退 (こうたい) generally means "retreat," "regression," "withdrawal," or "to go back." It can be used in a variety of contexts, both literally and figuratively. It describes the act of moving backward, lessening in quality or amount, or backing down from a position. The meaning depends on the context of the sentence. It's a versatile word used to describe both physical and abstract movements or changes. The core idea is a movement or change in a direction opposite to the forward or desired progression. The meaning depends on context. The meaning changes based on the surrounding words and situation. The 後退 can refer to a physical action (like a military retreat), or an abstract one (like a decline in sales or progress).

⚫︎ 軍隊が後退した。 Translation: The army retreated. ⚫︎ 景気が後退している。 Translation: The economy is in decline. ⚫︎ 交渉から後退することを決めた。 Translation: They decided to back down from the negotiation.

後退 is a formal word, suitable for both written and spoken language. You can use this word when describing: ⚫︎ Physical actions: retreat, backing up. ⚫︎ Progress: decline, worsening. ⚫︎ Decision-making: withdrawing, stepping back. The most appropriate word depends on the context. If you want to talk about a specific context, you need to use the right word, e.g. "退却" for retreat in a battle, or "退化" for regression in biological terms. It is generally not used in casual conversations, unless in the context is in a formal situation or describing a serious matter.

⚫︎ 後退 is written using the kanji 後 (こう - behind, later) and 退 (たい - retreat, withdraw). ⚫︎ The reading is こうたい (hiragana). ⚫︎ The okurigana (the suffix hiragana) can vary depending on the conjugation. For instance, 後退する (to retreat/regress), 後退した (retreated/regressed), or 後退中 (in retreat/regressing).

⚫︎ 退却 (たいきゃく) - retreat (military context) ⚫︎ 退く (しりぞく) - to retreat, to withdraw (general) ⚫︎ 後ずさり (あとずさり) - to step back, to recoil (physical) ⚫︎ 衰退 (すいたい) - decline, decay (e.g., of an industry) ⚫︎ 減少 (げんしょう) - decrease

⚫︎ 前進 (ぜんしん) - advance, progress ⚫︎ 進歩 (しんぽ) - progress, improvement ⚫︎ 発展 (はってん) - development, growth ⚫︎ 向上 (こうじょう) - improvement, advancement

敵は激しい攻撃に耐えられず、後退を余儀なくされた。 ・Translation: The enemy, unable to withstand the fierce attack, was forced to retreat. ・Explanation: This sentence uses 後退 to describe a military situation where the enemy has been forced to withdraw due to superior force.

会社の業績は近年後退傾向にある。 ・Translation: The company's performance has been in a declining trend in recent years. ・Explanation: This example applies 後退 to describe a downward trend in business performance.

The word 後退 is formed by combining the kanji 後 (meaning "behind" or "later") and 退 (meaning "retreat" or "withdraw"). The combination signifies the act of moving backward or withdrawing. It is a compound word whose meaning directly reflects the meanings of its component kanji. The formation makes it easy to understand; "behind" and "retreat" together give the sense of going back.