副詞（ふくし、fukushi）
- adverb

副詞 (ふくし) is the Japanese word for "adverb." An adverb modifies a verb, an adjective, another adverb, or even an entire sentence, providing more information about how, when, where, or to what extent something happens. Adverbs add detail and nuance to the sentences.

⚫︎彼女はとても速く走ります。 Translation: She runs very fast. ⚫︎私は昨日映画を見ました。 Translation: I watched a movie yesterday. ⚫︎彼は静かに本を読みました。 Translation: He read the book quietly.

You use 副詞 to add detail and precision to your sentences. They are placed in various positions, but often come before the word they modify. For example, adverbs of manner (like "quietly") often come before the verb. Adverbs of time (like "yesterday") can often appear at the beginning or end of the sentence. Adverbs of degree (like "very") will go before the adjective or another adverb.

副詞 is typically written in kanji 副詞, with the reading in hiragana: ふくし. There is only one standard way to write it.

There are no direct single-word synonyms for 副詞, as it is a grammatical term. However, words that can function as adverbs (depending on their usage) include words related to time, manner, degree, and so on. For example, in some contexts, words like とても(very), ゆっくり(slowly), and いつも(always) can act like adverbs.

There aren't specific antonyms in the same way you might find them for other parts of speech (like adjectives). The "opposite" of an adverb would be a word that expresses the opposite meaning of what the adverb is conveying. For instance, the antonym of 速く(fast, as an adverb) would be ゆっくり(slowly, as an adverb).

彼はゆっくりと歩いた。 ・Translation: He walked slowly. ・Explanation: The adverb ゆっくり modifies the verb 歩いた(walked), describing how he walked.

私は今日、学校に行きました。 ・Translation: I went to school today. ・Explanation: The adverb 今日 modifies the verb 行きました(went), indicating when the action occurred.

The word 副詞 is formed from the following components: ⚫︎副(fuku) - meaning "auxiliary" or "sub-" ⚫︎詞(shi) - meaning "word" or "part of speech" Therefore, 副詞 literally translates to "auxiliary word" or "modifying word", reflecting its function of modifying other words in a sentence.