covertly russian

• секре́тно

  secretly, covertly, in secret

• крыто

  covertly, secretly, under cover

• подспу́дно

  latently, subconsciously, implicitly, covertly

• подки́дывающий

  tossing, throwing up, flinging up

  planting (surreptitiously), slipping (in), covertly placing

• подсыла́емый

  being sent in, being dispatched covertly