偽誓 is read as ぎせい (gisei) and means perjury.
ぎせい
gisei
いつわりちかう
to swear falsely
ぎぶつ
spurious article
ぎぞう
forgery
ぎそう
camouflage
にせ
pseudo-
いつわる
to deceive
ぎしょう
false evidence
ぎめい
false name
ぎぜん
hypocrisy
いつわり
lie
にせちゅうごくご
pseudo-Chinese
ぎこぎって
counterfeit check (cheque)