wa·ter·weed 
(wôtər-wēd′, wŏtər-)
(wôtər-wēd′, wŏtər-)n.
Any of various submersed aquatic plants, especially of the genera Elodea and Egeria.
- immunologically
- immunologist
- immunology
- immunoreaction
- immunoreactive
- immunoreactivity
- immunostimulant
- immunosuppressant
- immunosuppressed
- immunosuppression
- immunosuppressive
- immunotherapeutic
- immunotherapist
- immunotherapy
- immunotoxin
- immure
- immurement
- immutability
- immutable
- immutableness
- immutably
- Imogen
- Imogene
- imp
- imp.