one's
1 det Speakers and writers use one's to indicate that something belongs or relates to people in general, or to themselves in particular.
FORMAL
(=your)
...a feeling of responsibility for the welfare of others in one's community...
2 One's can be used as a spoken form of `one is' or `one has', especially when `has' is an auxiliary verb.
No one's going to hurt you. No one. Not any more..., I think one's got to consider all the possibilities.
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one
Translation English - Cobuild Collins Dictionary  

leisure
1 breathing space, ease, freedom, free time, holiday, liberty, opportunity, pause, quiet, recreation, relaxation, respite, rest, retirement, spare moments, spare time, time off, vacation
a available, free, not booked up, on holiday, unengaged, unoccupied
b at one's leisure at an unhurried pace, at one's convenience, deliberately, in one's own (good) time, unhurriedly, when it suits one, when one gets round to it (informal) without hurry
Antonyms
business, duty, employment, labour, obligation, occupation, work
English Collins Dictionary - English synonyms & Thesaurus

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"Collins Cobuild English Dictionary for Advanced Learners 4th edition published in 2003 © HarperCollins Publishers 1987, 1995, 2001, 2003 and Collins A-Z Thesaurus 1st edition first published in 1995 © HarperCollins Publishers 1995"