Synonym Comparison
The Nuance Difference: "よく" vs "役に立つ"
Master the exact conceptual boundary between these Japanese terms.
Japanese Term A
よく
よく (yoku)
N5 / CEFR Syllabus
VS
Japanese Term B
役に立つ
やくにたつ (yaku ni tatsu)
N4 / CEFR Syllabus
Nuance Contrast & Social Differences
In Japanese, both よく and 役に立つ are often translated to English but have distinct usages.
よく (よく (yoku)) represents "well, often, frequently" (Level: N5) and typically represents Adverb. Can mean 'well'.
On the other hand, 役に立つ (やくにたつ (yaku ni tatsu)) translates to "to be useful, to be helpful" (Level: N4) and is used for A set phrase meaning to be useful or helpful for someone or something. It describes the utility of an object, skill, or person. Often followed by the particle に. Mixing these up can sound unnatural to native Japanese speakers!
Bilingual Sentence for "よく"
私は週末によく映画を見ます。
I often watch movies on weekends.
Bilingual Sentence for "役に立つ"
この辞書は日本語の勉強に役に立ちます。
This dictionary is useful for studying Japanese.
Nuance Mastery Quiz
Which Japanese word perfectly fits this blank space?
Fill in the blank: "私は週末に ＿＿＿ 映画を見ます。" (Meaning: "I often watch movies on weekends.")
🎉 Correct Answer!
Remember: "よく" fits here because it represents "well, often, frequently" in the context: "I often watch movies on weekends.".