Greenest

adjective

1. Having green as its color.

   "The former flag of Libya is fully green."

2. (of people) Sickly, unwell.

   "Sally looks pretty green — is she going to be sick?"

3. Unripe, said of certain fruits that change color when they ripen.
4. (of people) Inexperienced.

   "John's kind of green, so take it easy on him this first week."

5. (of people) Naive or unaware of obvious facts.