immensely

adverb

it was an immensely difficult decision |

they enjoyed themselves immensely:

extremely, very, exceedingly, exceptionally, especially, extraordinarily, tremendously, vastly, hugely, abundantly, intensely, acutely, singularly, significantly, distinctly, outstandingly, uncommonly, unusually, decidedly, particularly, eminently, supremely, highly, remarkably, really, truly, mightily, thoroughly, to a fault, in the extreme, extra;

all that, to a great extent, most, so;

Scottish unco;

French très;

Northern English right;

informal terrifically, awfully, fearfully, terribly, devilishly, majorly, seriously, mega, ultra, oh-so, stinking, mucho, damn, damned;

informal , mainly humorous bigly;

informal , dated devilish, hellish, frightfully;

British, informal ever so, well, bloody, dead, dirty, jolly, fair;

North American, informal real, mighty, powerful, awful, plumb, darned, way, bitching;

South African, informal lekker;

archaic exceeding.

▷antonyms slightly; by no means.

immensely Oxford Dictionary of English