形容詞 discursive:

1. proceeding to a conclusion by reason or argument rather than intuition
   同義詞：dianoetic
2. (of e.g. speech and writing) tending to depart from the main point or cover a wide range of subjects
   同義詞：digressive, excursive, rambling

dis.cur.sive

adj.（形容詞）
Covering a wide field of subjects; rambling.
主題不明的，東拉西扯的：包含很大范圍的主題；雜亂無章的
Proceeding to a conclusion through reason rather than intuition.
推論的，論證的：通過推理而非直覺來得出結(jié)論的

來源：
Medieval Latin discursovus
中世紀(jì)拉丁語 discursovus
from Latin discursus [running about] * see discourse
源自 拉丁語 discursus [東奔西跑；奔忙] *參見 discourse

【引伸】
discur.sively
adv.（副詞）
discur.siveness
n.（名詞）