unsarcastically

adjective

1. of, relating to, or characterized by sarcasm: a sarcastic reply.
2. using or given to the use of sarcasm: His business failures made him sarcastic about other people’s ventures.

adjective

1. characterized by sarcasm
2. given to the use of sarcasm

adj.1690s, from sarcasm, perhaps on the model of enthusiastic. Related: Sarcastical (1640s); sarcastically.