Search the dictionary A Chinese word or character, or English Search 7 entries. yōusī 忧思 to be anxious and worried yōusī 憂思 to be anxious and worried yóusī 游丝 gossamer yóusī 游絲 gossamer yǒusī 有司 officials yǒusīfēnliè 有丝分裂 mitosis yǒusīfēnliè 有絲分裂 mitosis