verb
infuse
in-FYOOZ/ɪnˈfjuːz/
To introduce a substance gradually or thoroughly into something.
The mint leaves infuse the hot water with flavor.

Etymology
The pieces give the image of “pouring into.” Infuse applies that image to introducing a substance or quality into something; its early English meanings already included steeping and soaking in liquid.
In context
it's going to get really hard and brittle but it's going to infuse your sugar with wonderful flavor
More examples
- The nurse slowly infuses medication into the patient's bloodstream.
- Let the lemon peel infuse the syrup with flavor.
- The treatment infuses wood with a protective resin.
Forms
infuse · infuses · infused · infusing
infusion noun — The introduction of a substance into something.
Similar words
- inject
- Emphasizes forcing a substance in, often through a needle.
- impregnate
- Emphasizes saturating a material throughout with another substance.