disjunct

disjunct (holdningsadverbial): a type of adverbial that is always optional in the clause. Disjuncts are evaluative; they express the speaker's judgement of the truth of the utterance (modal disjuncts, e.g. probably, certainly, maybe), the speaker's evaluation of a fact (fact-evaluating disjuncts, e.g. fortunately, actually, to my surprise), the speaker's comment on his/her own wording of the sentence (e.g. briefly, in other words, to tell you the truth), or the speaker’s comment on the subject referent (subject-evaluating disjuncts, e.g. Wisely, she spent the money = 'she was wise to spend the money')