弟

Meaning

Younger brother · hermano menor

Readings

• On (音読み): テイ・ダイ・デ
• Kun (訓読み): おとうと

Example words

• 弟（おとうと）— younger brother
• 弟さん（おとうとさん）— (your) younger brother
• 兄弟（きょうだい）— siblings; brothers

Structure

Radical 弓 (ゆみ・ゆみへん · Bow) · 7 strokes · school grade 2

Watch out

No お- prefix for younger siblings: someone else's younger brother is 弟さん, never ×お弟さん. おとうと = お・とう・と — the middle syllable is long (same pattern as いもうと); ×おとと is a common slip. 兄弟 uses the ダイ reading, not テイ.