acerbically

adjective

1. sour or astringent in taste: Lemon juice is acerbic.
2. harsh or severe, as of temper or expression: acerbic criticism.

adjective

1. harsh, bitter, or astringent; sour

adj.

1865, originally, and usually, figurative: “sour, harsh, severe” (of speech, manners, etc.), from Latin acerbus “harsh to the taste, sharp, bitter, sour” (see acerbity) + -ic.