on the sly (o) (secret) | sigilosamente (o) (secret) |
on the sly (o) (deception) | a escondidas (o) (deception) |
on the sly (o) (secret) | en secreto (o) (secret) |
on the sly (o) (deception) | a urtadillas (o) (deception) |
on the sly (o) (deception) | en secreto (o) (deception) |