focusing
焦点を合わせる
解説 Definition
focusing は focus（焦点を合わせる、集中する）の現在分詞・動名詞です。注意や関心を一つの対象に向けること、またカメラなどの焦点を合わせることを表します。
Focusing is the act or process of directing attention toward one subject or adjusting an optical device so that an image becomes clear. It is also the present participle of focus, used in continuous verb forms.
覚え方のコツ Memory Tip
focusing は focus に -ing を付けた現在分詞・動名詞で、「集中していること」や「焦点を合わせること」を表します。focus が s で終わっても通常は子音を重ねず focusing と綴ります。focus on homework、focus the camera の組み合わせで覚えましょう。
Start with the base verb focus and add -ing: focus becomes focusing, normally without doubling the final consonant. Link its two main settings through the idea of making one target clear. In “focusing on homework,” attention is directed toward a single task; in “focusing the camera,” the lens is adjusted to produce a sharp image. Remember the common pattern focus on plus a topic, but use focus plus an object when adjusting a camera or lens.
例文
She is focusing on her homework.
彼女は宿題に集中しています。
Focusing the camera took a few seconds.
カメラの焦点を合わせるのに数秒かかりました。
The team is focusing on one problem at a time.
チームは一度に一つの問題に焦点を合わせています。
focusing の類義語・関連語
focusing の語源・成り立ち Etymology
ラテン語「focus（炉・暖炉）」に由来。暖炉が家庭の中心であったことから「中心点」の意味が生じ、光学用語で「焦点」を意味するようになった。関連語にfocal（焦点の）、refocus（再び焦点を合わせる）がある。-ingは動名詞・現在分詞を作る接尾辞。
Focus comes from Latin focus, meaning “hearth” or “fireplace.” Because the hearth was a central point in a home, the word later developed the sense of a center or concentrated point. It entered scientific use for the point where rays meet and then gained its modern sense of concentrated attention. Focusing is formed by adding the present-participle and gerund suffix -ing to focus.
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