vastaioni

== Finnish == === Etymology === vasta- +‎ ioni === Pronunciation === IPA(key): /ˈʋɑstɑˌioni/, [ˈʋɑ̝s̠tɑ̝ˌio̞ni] Rhymes: -ioni Syllabification(key): vas‧ta‧i‧o‧ni Hyphenation(key): vasta‧io‧ni === Noun === vastaioni (chemistry) counterion ==== Declension ====