perpetual

adjective

• 1never ending or changing:deep caves in perpetual darkness
• [attributive] denoting or having a position, job, or trophy held for life:a perpetual secretary of the society
• (of an investment) having no fixed maturity date; irredeemable:a perpetual bond

• 2occurring repeatedly; so frequent as to seem endless and uninterrupted:their perpetual money worries

• 3(of a plant) blooming or fruiting several times in one season: he grows perpetual flowering carnations