in.

名词 in.:

1. a unit of length equal to one twelfth of a foot
   同义词：inch, in
2. a rare soft silvery metallic element; occurs in small quantities in sphalerite
   同义词：indium, In, atomic number 49
3. a state in midwestern United States
   同义词：Indiana, Hoosier State, IN

形容词 in.:

1. holding office
   同义词：in
2. directed or bound inward
   同义词：in
3. currently fashionable
   同义词：in

副词 in.:

1. to or toward the inside of
   同义词：in, inwards, inward