Infusion

зава́ривание

zavárivanije

(act of steeping or soaking a substance in liquid so as to extract medicinal or herbal qualities)

зава́рка

zavárka

(a product consisting of a liquid which has had other ingredients steeped in it to extract useful qualities)

насто́й

nastój

(a product consisting of a liquid which has had other ingredients steeped in it to extract useful qualities)