boon

1. A prayer; petition.
2. That which is asked or granted as a benefit or favor; a gift or benefaction.
3. A good thing; a blessing or benefit; a thing to be thankful for.

   Anaesthetics are a great boon to modern surgery.

4. An unpaid service due by a tenant to his lord.

1. Good; prosperous.

   boon voyage

2. Kind; bountiful; benign.
3. (Now only in boon companion) gay; merry; jovial; convivial.

noun

The woody portion of flax, separated from the fiber as refuse matter by retting, braking, and scutching.