As for word formation, most Austroasiatic languages have a variety of derivational prefixes, many have infixes, but suffixes are almost completely non-existent in most branches except Munda, and a few specialized exceptions in other Austroasiatic branches.
æz fɔːɹ wˈɜːd fɔːɹmˈeɪʃən, mˈoʊst ˌɔːstɹoʊsɪˈæɾɪk lˈæŋɡwɪdʒᵻz hæv ɐ vɚɹˈaɪəɾi ʌv dˌɛɹɪvˈeɪʃənəl pɹˈiːfɪksᵻz, mˈɛni hæv ɪnfˈɪksᵻz, bˌʌt sˈʌfɪksᵻz ɑːɹ ˈɔːlmoʊst kəmplˈiːtli nˈɑːnɛɡzˈɪstənt ɪn mˈoʊst bɹˈæntʃᵻz ɛksˈɛpt mˈʌndə, ænd ɐ fjˈuː spˈɛʃəlˌaɪzd ɛksˈɛpʃənz ɪn ˈʌðɚɹ ˌɔːstɹoʊsɪˈæɾɪk bɹˈæntʃᵻz.