longest-lasting
Outlasts all others
Longest-lasting describes something that endures or persists for the greatest duration compared to alternatives: the longest-lasting battery on the market, their longest-lasting friendship.
The hyphen joins the compound when it precedes a noun; without the hyphen, the phrase works as a predicate: This brand lasts longest.
Resistant to damage
- sturdySolidly built, durable
- robustStrong and durable
- toughDurable and strong
- resilientAble to recover quickly
indestructible · heavy-duty · rugged · unbreakable · reinforced · solid · strong · impervious
Very old indeed
- historicOf lasting significance
- venerableDeserving honor for dignity
- establishedFormally set up
- provenEstablished as fact
time-honored · classic · traditional · heritage · legendary · perennial · vintage · antique
Continuing despite difficulty
- tenaciousStubbornly determined to continue
- perseveringMaintaining effort despite difficulty
- tirelessNever losing energy
- steadfastFirmly loyal, unshakeable
unwavering · constant · sustained · continuous · abiding · perpetual · ongoing · unending
hard-wearing
Resistant to damage
resilient · indestructible · heavy-duty · rugged · unbreakable · reinforced · solid · strong · impervious · weatherproof
ancient
Very old indeed
- historicOf lasting significance
- venerableDeserving honor for dignity
- establishedFormally set up
proven · time-honored · classic · traditional · heritage · legendary · perennial · vintage · antique · ancestral
persistent
Continuing despite difficulty
- tenaciousStubbornly determined to continue
- perseveringMaintaining effort despite difficulty
- tirelessNever losing energy
steadfast · unwavering · constant · sustained · continuous · abiding · perpetual · ongoing · unending · surviving
unchanging
Not varying at all
settled · secure · balanced · consistent · unvarying · maintained · preserved · intact · unaltered · sustained