From Wiktionary, the free dictionary
값〮 (káps, “value”) + 없〯다 (ěpstà, “not have”).
- (Morphophonemic) IPA(key): ⫽kǎpsɘ̌pstá⫽
값〮없〯다〮 (káps-ěps-tá) (infinitive 값〮업〯서〮, sequential 값〯업〯스니〮)
- priceless, extremely valuable
1459, 월인석보 (Worin Seokbo), volume 15, page 22b:그ᄢᅴ 親ᄒᆞᆫ 버디 그윗 일로 나갈 쩨 값업슨 寶珠로 옷 소배 ᄆᆡ야 주구 니거늘- ku-pskuy CHINho-n pet-i kuwu-ys il-lwo naka-l ccey kaps-eps-un PWO.CYWU-lwo wos swop-ay moy-ya cwu-kwu ni-kenul
- Right then, when a close friend went out for a government job, they attached priceless pearls inside his clothes before going.