Two is the number after one and before three — a pair, a couple, the number of hands you have.
The spelling is the difficulty and it is worth a moment: the w is silent, and it is there because two is related to twin, twice, twelve, twenty and between, all of which keep the w audible. Once you see the family the silent letter stops looking arbitrary. Note that two, to and too sound identical and are among the most confused words in written English: two is the number, to is the preposition, too means also or excessively.
1nountwoThe number 2.~98%
“There are two left in the box.”
2nounoclockTwo o'clock.~2%
“The train gets in at two.”
Shares are an estimate: a language model read 24 sentences found in the wild and placed 24 of them on a sense — a count of our sample, not a measurement of English.
two is a number.
Old English twa goes back to Proto-Indo-European *dwo, which gives Latin duo, Greek duo and Sanskrit dva. The w survives in writing and in the whole family — twin, twice, twilight, which is the light of two times — and was lost from the pronunciation of two alone.
Proto-Indo-European
*dwóh₁
Middle English
two
English, today
two
From Middle English two. From Middle English two, twa, from Old English twā, feminine and neuter of twēġen (whence twain), from Proto-West Germanic twai-, from Proto-Germanic twai, from Proto-Indo-European dwóh₁. 2
Etymology from Wiktionary, CC BY-SA