How do you say do in Spanish?

hacer In English, we may start a question with "do," as in "Do you live in America?" In Spanish, this Word is not spoken as a separate Word in these cases, but is implied in the verb, such as "¿Vives en América?" means "Do you live in America?" But in other cases, in which the Words "to do" are used, it is "hacer," as in "I have to do something." "Tengo que hacer algo."
Do sounds like du in Spanish.

That's the transliteration (Spanish spelling of the English sound). But if you mean 'how do you say 'do' in Spanish?', the infinitive (to do) of the verb is 'hacer' (pronounced 'athAIR'), and the present tense goes:

HAgo - I do

HAces - you (informal) do

HAce - he/she/it does/you (singular, formal) do

hacEmos - we do

hacEis - you (plural, informal) do

HAcen - they/you (plural, formal) do.

The capital letters show where the Word is stressed.

The 'H' is not spoken.

The vowels are pronounced: 'a' as in English 'bag; 'e' as in 'best' as said by a Scot, so a bit like 'baste'; 'i' as 'ea' in 'beast'.

The diphthong (two vowels) 'Ei' is pronounced like 'ey' in '(th)EY.