elusive
eludere "elude, frustrate" + -ive
https://gyazo.com/785c93e72a9f0ad195fafbbc618ed9e3
source: Lupin Central
adjective
difficult to find, catch, or achieve:
〈人･動物などが〉うまく逃れる; 捕らえにくい, 見つけにくい
〈結果などが〉手に入れにくい, 達成しがたい
e.g. success will become ever more elusive.
difficult to remember or recall:
理解しにくい, 捕らえどころのない; 思い出せない
e.g. the elusive thought he had had moments before.
DERIVATIVES
elusively |əˈlo͞osivlē| adverb
elusiveness |əˈlo͞osivnəs| noun
ORIGIN
early 18th century: from Latin elus- ‘eluded’ (from the verb eludere) + -ive.