Sottaku logo Sottaku
Japanese

てっきゅう
Meaning: iron ball; metal sphere
Part of Speech: Noun

Listen to pronunciation

Example

実験では、鉄球を斜面から転がして速度を測った。
In the experiment, we rolled an iron ball down a slope and measured its speed.

Usage Notes

A solid sphere made mainly of iron or steel, often used in physics demonstrations, machinery, or descriptions of heavy objects.

Sottaku

About Sottaku

Sottaku is an app for learning a growing range of Asian and European languages with a strong focus on SRS. It includes automatic flashcard creation for hundreds of thousands of words, grammar breakdowns in example sentences, language-specific study packs where available, adaptive quizzes, mobile apps, a browser extension, and community features. Give it a try now! All learning content is free with no limits on flashcards or study time.

Sottaku is built to match the habits of successful learners. By using Sottaku, you will naturally learn in the most efficient way possible, as proven by countless success stories in the language learning community.

Free Forever

Access all grammar guides, quizzes, and flashcards without paying a cent. Quality education should be accessible to everyone.

Smart SRS System

Our flashcard system uses the FSRS algorithm (also used in Anki) to optimize your review schedule and maximize retention.

Comprehensive Content

From hanzi, kana, hangul, and European vocabulary basics to grammar and reading practice where available, we have lessons for every level. Practice with quizzes tailored to your skill.

Community Chat

Ask level-appropriate questions and get help from the community. Learn together with fellow learners across every supported language.