Pillars of a throne or a building.

perpetual, lasting, permanent, eternal

valetudinarian, constantly sick

one who fasts round the year

Imprisonment for life, perpetually imprisoned

perpetually drinking wine, addicted to drinking, sottish, sot, drunkard, boozer

eternal, perpetual, lasting, everlasting, permanent, enduring, durable, standing, not intermittent (as fever), ceaseless

God

forever trusted

permanently, all time, constantly, daily

continuance, permanence, durability, eternity, perpetuity, the state or quality of lasting or remaining unchanged

stationary, firm, durable and eternal