best friend
best friend; A term of address for someone, usually used to instruct, to make a statement, or to draw attention.
A friend, pal, buddy, mate.
The inner meaning or purpose.
The pith of certain plants.
Bone marrow biopsy.
The essence; the best part.
The substance inside bones which produces blood cells.
A kind of vegetable like a large courgette/zucchini or squash.