Rooibos

Rooibos, (pronounced /ˈrɔɪbɒs/, like "roy-boss"), Afrikaans for "red bush"; scientific name Aspalathus linearis) is a broom-like member of the legume family of plants. The plant is used to make a "tea" infusion.

A rooibos infusion is called rooibos tea, bush tea (esp. southern Africa), redbush tea (esp. UK), South African red tea (esp. USA), or red tea. The product has been popular in southern Africa for generations and is now consumed in many countries. It is sometimes spelled rooibosch in accordance with the Dutch etymology, but "roy-boss" remains the most common modern pronunciation.

Wikipedia article "Rooibos".

in・fuse

━━ vt. 注ぐ; （思想などを）吹込む ((into; with)); 煎じる, 浸出させる.
━━ vi. （茶などが）出る.
in・fu・sion
　━━ n. 注入（物）; 【医】注入液; 浸出（液）; 鼓吹.