This is the 10870th most frequent Russian word.
вымойте
"Wash" or "clean" (imperative form, formal/plural).
Here, 'вымойте' is used as an imperative verb, instructing someone to perform the action of washing.
Если руки грязные, вымойте их пожалуйста.
If your hands are dirty, please wash them.
In this context, 'вымойте' is again an imperative verb, suggesting a habitual action for hygiene reasons.
Перед ужином всегда вымойте овощи.
Always wash the vegetables before dinner.
Here, 'вымойте' is mentioned as a repeated command or reminder within the narrative of instruction.