adj. 25B6; adverb
there was only enough for two : AT MOST, at best, (only) just, no/not more than; barely, scarcely, hardly.
he only works on one picture at a time : EXCLUSIVELY, solely, to the exclusion of everything else.
you're only saying that : MERELY, simply, just.
25B6; adjective their only son : SOLE, single, one (and only), solitary, lone, unique; exclusive.