Englishoneself
pronoun
□ by oneself
1 reading by oneself was encouraged only when it was raining:
alone, all alone, on one's own, in a solitary state, singly, separately, solitarily, unaccompanied, companionless, partnerless, unattended, unescorted, unchaperoned, solo;
informal by one's lonesome;
British, informal on one's tod, on one's lonesome, on one's jack, on one's Jack Jones.
2 there is no possibility of creating anything either by oneself or in conjunction with others:
unaided, unassisted, without help, without assistance, by one's own efforts, under one's own steam, independently, single-handed(ly), solo, on one's own, alone, all alone, off one's own bat, on one's own initiative.
by Oxford Dictionary of English