Englishlargely
adverb
the engineer William Jessop was largely responsible for this pioneering work:
mostly, mainly, to a large extent, to a great extent, to a great degree, on the whole, chiefly, generally, in general, predominantly, substantially, primarily, overall, for the most part, in the main, principally, in great measure, preponderantly, first and foremost, for all intents and purposes, basically;
usually, typically, commonly.
largely Oxford Dictionary of English