BEST (3)

Best, adv.; superl. of Well. 1. 1. In the highest degree; beyond all others. “Thou serpent! That name best befits thee.” Milton.
He prayeth best, who loveth best All things both great and small. Coleridge. 2. 2. To the most advantage; with the most success, case, profit, benefit, or propriety.
Had we best retire? I see a storm. Milton. Had I not best go to her? Thackeray. 3. 3. Most intimately; most thoroughly or correctly; as, what is expedient is best known to himself.