discursive

形容词 discursive:

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

dis.cur.sive

adj.（形容词）
Covering a wide field of subjects; rambling.
主题不明的，东拉西扯的：包含很大范围的主题；杂乱无章的
Proceeding to a conclusion through reason rather than intuition.
推论的，论证的：通过推理而非直觉来得出结论的

来源：
Medieval Latin discursovus
中世纪拉丁语 discursovus
from Latin discursus [running about] * see discourse
源自 拉丁语 discursus [东奔西跑；奔忙] *参见 discourse

【引伸】
discur.sively
adv.（副词）
discur.siveness
n.（名词）