fictitious

形容词 fictitious:

1. formed or conceived by the imagination
   同义词：fabricated, fancied, fictional, invented, made-up
2. adopted in order to deceive
   同义词：assumed, false, fictive, pretended, put on, sham

1. A fictitious name assumed by an author; a pen name.
   假名一个作者采用的假名; 笔名
2. Greeted me with a fictitious enthusiasm.
   用虚伪的热情跟我打招呼

fic.ti.tious

adj.Abbr. fict.（形容词）缩写 fict.
Of, relating to, or characterized by fiction; imaginary.
虚构的，想象的：属于或关于虚构的故事的，或以此为特征的；想象的

Accepted or assumed for the sake of convention:
传统的：习惯上被接受了的或假定的：
例句：
a fictitious belief.
传统的信仰

Adopted or assumed in order to deceive:
假的：为欺骗而采纳或假定的：
例句：
a fictitious name.
假名

Not genuinely believed or felt; sham:
伪装的：不是真地相信或感觉的；虚伪的：
例句：
greeted me with a fictitious enthusiasm.
用虚伪的热情跟我打招呼

来源：
From Latin fictocius
源自 拉丁语 fictocius
from fictus [past participle of] fingere [to form] * see fiction
源自 fictus [] fingere的过去分词 [形成] *参见 fiction

【引伸】
ficti.tiously
adv.（副词）
ficti.tiousness
n.（名词）