2 adjectives to describe embitterment

It is one of the main factors in the progressive embitterment of the Labour situation that whatever business is afootarbitration, conciliation, inquiryour contemporary system presents itself to Labour almost invariably in a legal guise.

"Miss POTTS!" ejaculated the wild young Southern pedestrian, pausing suddenly at her approach, with considerable excitement of manner, "scorn me, spurn me, if you will; but do not let sectional embitterment blind you to the fact that I am here by the request of Mr. DIBBLE.

2 adjectives to describe  embitterment