An Arrhenius base, on the other hand, is a substance that increases the concentration of hydroxide (OH−) ions when dissolved in water.
ɐn ɚrhˈiːnɪəs bˈeɪs, ɔnðɪ ˈʌðɚ hˈænd, ɪz ɐ sˈʌbstəns ðæt ɪŋkɹˈiːsᵻz ðə kˌɑːnsəntɹˈeɪʃən ʌv haɪdɹˈɑːksaɪd ˌoʊˈeɪtʃ mˈaɪnəs ˈaɪɑːnz wɛn dɪsˈɑːlvd ɪn wˈɔːɾɚ.