Nowadays = _nuntempe_.
Nowhere, not anywhere = _nenie_.
O
Of = _da; de; el; en; inter; pri_, etc., according to sense.
Of course = _kompreneble_.
Of late = _en la lasta tempo; de mallonga tempo_.
Off = _for de; de_.
Often = _ofte; multfoje_.
On = _de; en; por; sur_, etc., according to sense.
On account of = _kauze de; pro_.
On arrival = _alvenante; alveninte; ce alveno_.
On behalf of = _por; por la profito de_.
On condition that = _kondice, ke_; or, _kun la kondico, ke_.
On consideration = _konsiderinte; pripensinte_.
On every occasion = _en ciu okazo; ciuokaze_.
On first thoughts = _ekpensinte; unuapense_.
On (for) hire = _luebla; luata_.
On loan = _prunte_.
On my account = _por mi_ (for my sake); _pro mi_ (because of me).
On my part = _miaflanke; de mia flanko; miaparte_.
On no account = _nenial_.
On one's own account = _pro (por) si mem_.
On purpose = _intence; cele_.
On sale = _vendata; vendebla_.
On second thoughts = _post plua konsiderado; duapense_.
On that = _ce tio_.
On that account = _pro tio; tial_.
On the contrary = _kontraue; male; inverse_.
On the day = _en la tago; la tagon_.
On the other hand = _aliflanke; aliparte_.
On the other side of = _trans; aliflanke de_.
On the supposition that = _supoze, ke_.
On the part of = _flanke de_.
On the way = _en (sur) la vojo; survoje_.
On the whole = _entute_.
On this = _ce tio (ci)_.
On this account = _pro ci tio; (ci) tial_.
On view = _elmontrata_.
Once = _foje; iam_ (sometime), _unufoje_ (once); _unu fojon_ (one time, on one occasion).
Once a week = _unu fojon semajne (en semajno)_.
Once again = _denove; ankorau unu fojon_.
Once for all = _unufoje por ciam; unu fojon por ciam_.
Once in a way = _por unu fojo; okaze_.
Once more = _bis; denove; ree; ankorau unufoje (unu fojon)_.
Once upon a time = _iam; foje_.
Once when = _foje, kiam_.
One = _unu_.
One after another = _unu post (la) ilia_.
One and the other = _ambau_.
One another = _unu la alian; sin reciproke_.
One at a time = _unuope_.
One by one = _unu post unu; unuope_.
One day = _iam; en unu tago; foje; unu tagon_.
One day when = _foje kiam; iam, kiam; en unu tago, kiam_.
One or other of them = _unu au alia el ili_.
One to another = _unu al alia_.
Only = _nur; sed_ (but); _sole; sola_.
Only just = _apenau, preskau ne_.
Opposite to = _kontrau_.
Or = _au; alie_.
Other = _alia_.
Other kinds = _alispecoj_; or, _aliaj specoj_.
Other than = _krom; alia ol_.
Others, the = _la aliaj_; (the rest remaining = _la ceteraj_).
Otherwise = _alie; se ne; alimaniere; en alia okazo_.
Out of = _el_.
Out of date = _malnovmoda; ne lau modo; ne laumoda_.
Out of order = _malorda; malordigita; ekstervise_.
Out of place = _ne gustaloke_.
Out of print = _elvendita_ (sold out); _elcerpita_ (exhausted).
Outside = _ekster; ekstere de_.
Over = _super; pli ol_.
Over against = _kontrau_.
Over and above = _pli ol; troe_.
Overlooking = _kontrau; rigardante sur_.
Owing to = _kauze de; pro; dank'al; suldata al; pere de_.
P
Particular = _aparta; speciala_.
Particularly = _precipe; aparte_.
Per, _see_ "A."
Possibly = _eble_.
Post free = _afrankite_.
Precisely = _guste; precize_.
Precisely the same as = _tute same, kiel_.
Presently = _baldau; tuj; post iom da tempo_.
Probably = _kredeble; versajne; probable_.
Promptly = _rapide; tuj; akurate; baldau_.
Provided that = _se nur; kondice, ke_.
Putting aside the question = _lasante flanke la demandon_.
Q
Quite = _tute_.
Quite at home = _tute hejme; komforta_.
Quite right = _tute prava; tute gusta_.