insincere russian

• фальши́вый

  false, spurious, forged, artificial, imitation, insincere

• напускно́й

  insincere, affected, assumed, feigned

• неи́скренний

  insincere

• криводу́шный

  insincere, dishonest, crooked

• лицеме́ривший

  hypocritical, insincere, feigning

• фальши́вивший

  having played out of tune, having sung out of tune

  having acted falsely, having faked, having been insincere

• фальши́вящий

  playing out of tune, false, phony, insincere, faking

Examples

• Неи́скренний пода́рок впрок не пойдёт.One won't profit by an insincere gift.
• Том неи́скренен.Tom is insincere.
• Они неи́скренни.They're insincere.
• Том был неи́скренен.Tom was insincere.