niezwyczajnie in English:

Unusually warm weather caused problems for the apple harvest.

We are in for an unusually hot summer this year.

What happened to her? She is unusually talkative today.

Chancing upon an unusually beautiful woman one table away, Julian began to visibly shake.

Trang gave an unusually expensive Christmas gift to Sysko.

This autumn I am, unusually, watching many drama series.

The festival witnessed an unusually large attendance.