-cie

Inherited from Proto-Slavic *-tьje.

• IPA^(key): (10^th–15^th CE) /t͡ɕʲɛː/
• IPA^(key): (15^th CE) /t͡ɕʲe/

-cie n

1. forms gerunds

• Polish: -cie
• Silesian: -cie

• IPA^(key): /t͡ɕɛ/
• Rhymes: -ɛ
• Syllabification: -cie

Inherited from Old Polish -cie. By surface analysis, -ty +‎ -e.

-cie n

1. forms verbal nouns (gerunds) from verbs in conjugations: Xa

   Coordinate terms: -anie, -enie, -ęcie, -iwanie, -nięcie, -owanie, -ywanie

   ‎pić + ‎-cie → ‎picie

   ‎myć + ‎-cie → ‎mycie

Inherited from Proto-Slavic *-te.

-cie

1. forms the indicative present tense second person plural marker for verbs

   ‎śpiewać (“to sing”) + ‎-cie → ‎śpiewacie (“[you all/formal you] sing”)

• -cie in Polish dictionaries at PWN