na-adjective, noun
licentious; profligate; dissipated; wild
Describes unrestrained, self-indulgent behavior, often with a negative moral judgment. Used for people, lifestyles, or conduct that is excessively loose or debauched.
彼の放埒な生活はついに破滅を招いた。
His licentious lifestyle finally led to his ruin.
放埒の限りを尽くす。
To indulge in every kind of debauchery.
From Chinese 放埒 (fàngliè). The characters 放 (release, let go) and 埒 (boundary, limit) together suggest 'letting go of limits', i.e., unrestrained behavior.