adj. capable of withstanding wear and tear and decay; "durable denim jeans"

adj. existing for a long time; "hopes for a durable peace"; "a long-lasting friendship"

adj. very long lasting; "less durable rocks were gradually worn away to form valleys"; "the perdurable granite of the ancient Appalachian spine of the continent"

adj. physically toughened; "the tough bottoms of his feet"

adj. unceasing; "an abiding belief"; "imperishable truths"

adj. continuing or enduring without marked change in status or condition or place; "permanent secretary to the president"; "permanent address"; "literature of permanent value"

adj. steadfast in purpose or devotion or affection; "a man constant in adherence to his ideals"; "a constant lover"; "constant as the northern star"

adj. incapable of being changed or moved or undone; e.g. "frozen prices"; "living on fixed incomes"

adj. not subject or susceptible to change or variation in form or quality or nature; "the view of that time was that all species were immutable, created by God"

adj. not liable to or capable of change; "an invariable temperature"; "an invariable rule"; "his invariable courtesy"

adj. not capable of being changed or altered; "unalterable resolve"; "an unalterable ground rule"

adj. showing little if any change; "a static population"

adj. not liable to fluctuate or especially to fall; "stocks are still firm"

adj. continuing in time or space without interruption; "a continuous rearrangement of electrons in the solar atoms results in the emission of light"- James Jeans; "a continuous bout of illness lasting six months"; "lived in continuous fear"; "a continuous row of warehouses"; "a continuous line has no gaps or breaks in it"; "moving midweek holidays to the nearest Monday or Friday allows uninterrupted work weeks"

adj. having no limits or boundaries in time or space or extent or magnitude; "the infinite ingenuity of man"; "infinite wealth"

adj. never dying; "his undying fame"

adj. continuing forever or indefinitely; "the ageless themes of love and revenge"; "eternal truths"; "life everlasting"; "hell's perpetual fires"; "the unending bliss of heaven"

adj. capable of being made ready for service

adj. continued in your keeping or use or memory; "in...the retained pattern of dancers and guests remembered"

adj. fit or ready for use or service; "the toaster was still functional even after being dropped"; "the lawnmower is a bit rusty but still usable"; "an operational aircraft"; "the dishwasher is now in working order"

adj. lasting through all time; "agelong struggle for freedom"

adj. two months long; lasting two months

adj. lasting through an entire day

adj. relatively long in duration; tediously protracted; "a drawn-out argument"; "an extended discussion"; "a lengthy visit from her mother-in-law"; "a prolonged and bitter struggle"; "protracted negotiations"

adj. tiresomely long; seemingly without end; "endless debates"; "an endless conversation"; "the wait seemed eternal"; "eternal quarreling"; "an interminable sermon"

adj. continuing through life; "a lifelong friend"; "from lifelong habit"; "his lifelong study of Greek art"

adj. active over a long period of time

adj. of a gilt-edged security; having more than 15 years to run before redemption

adj. somewhat long

adj. over an extended time; "a longitudinal study of twins"

adj. involving an extended span of time; "long-range goals"

adj. relating to or extending over a relatively long time; "the long-run significance of the elections"; "the long-term reconstruction of countries damaged by the war"; "a long-term investment"

adj. having existed for a long time; "a longstanding friendship"; "the longstanding conflict"

adj. lasting, open, or operating through the whole night; "a nightlong vigil"; "an all-night drugstore"; "an overnight trip"

adj. lasting an indefinitely long time; suggesting self-renewal; "perennial happiness"

adj. lasting through a year; "attending yearlong courses"

adj. not subject to decay