名詞 second-hand:

1. an intermediate person; used in the phrase `at second hand'
   同義詞：second hand
2. hand marking seconds on a timepiece
   同義詞：second hand

形容詞 second-hand:

1. derived from what is primary or original; not firsthand
   同義詞：secondhand
2. previously used or owned by another
   同義詞：secondhand, used

副詞 second-hand:

1. from a source of previously owned goods
   同義詞：second hand
2. by indirect means
   同義詞：secondhand