adverb

Used to show that something is almost, but not completely, accurate or exact; roughly.

a journey of approximately two hours

roughly,about,around,just about,round about,or so,or thereabouts,more or less,in the neighbourhood of,in the region of,in the area of,in the vicinity of,of the order of,something like,or thereabouts,give or take,give or take a few,in round numbers,rounded down,rounded up