adv

• (manner) Accurately, competently, satisfactorily.
  "He does his job well."
• (manner) Completely, fully.
  "Well done steaks"
• (degree) To a significant degree.
  "That author is well known."
• (degree, UK, Ireland, Commonwealth, slang) Very (as a general-purpose intensifier).
  "That guy rocks! I think he's called Matthew Lillard or sommat but he is well cool in Scream."

adj

• (hypercorrect) Good, content.
  "“How are you?” — “I'm well, thank you!”"
• (uncommon) Prudent; good; well-advised.
  "In this respect it would be well for you to depart from the standard format and to indicate why you did what you did."
• (archaic, now chiefly Bermuda) Good to eat; tasty, delicious.
  "This wahoo tastes val."

intj

• (Ireland) Used as a greeting, short for "Are you well?"
  "Well, lads? How's things?"

noun

• (figurative) A source of supply.
  "Dan Chaucer, well of English undefyled"
• (nautical) A vertical, cylindrical trunk in a ship, reaching down to the lowest part of the hull, through which the bilge pumps operate.
• (nautical) The cockpit of a sailboat.
• (nautical) A compartment in the middle of the hold of a fishing vessel, made tight at the sides, but having holes perforated in the bottom to let in water to keep fish alive while they are transported to market.