擬勢 is read as ぎせい (gisei) and means bluff.
ぎせい
gisei
ぎすんぽうしゅうごうたい
assumed-size aggregate
ぎじんか
personification
ぎしんほう
ぎなんたいどうぶつ
molluscoid
ぎこしゅぎ
archaism
ぎじんかん
anthropomorphism
ぎじょうご
psychomime
ぎじがいこくがいしゃ
pseudo-foreign company
ぎこぶん
classical style
ぎたいご
phenomime
ぎようふけんちく
pseudo-Western architecture (of Meiji-period Japan)
ぎせいご
onomatope (i.e. word formed by onomatopoeia)