stealthily russian

• подбро́сить

  toss up, throw up, throw, put stealthily, add

  plant

  give a lift

  bring up

• укра́дкой

  stealthily

• подбра́сывать

  toss up, throw up, throw, put stealthily, add

  give a lift

  bring up

• подбира́ться

  approach stealthily

• исподтишка́

  stealthily, in an underhand way

• кра́дучись

  stealthily

Examples

• Впоследствии они бы́ли втайне уби́ты.Later, they were murdered stealthily.