形容詞 sidelong:

1. (used especially of glances) directed to one side with or as if with doubt or suspicion or envy
   同義詞：askance, askant, asquint, squint, squint-eyed, squinty
2. situated at or extending to the side- Tennyson
   同義詞：lateral
3. inclining or directed to one side - Bram Stoker

副詞 sidelong:

1. on the side
2. with the side toward someone or something- Nathaniel Hawthorne
3. to, toward or at one side
   同義詞：sideways, obliquely