Synonyms of 'sideways'
to the side
3 edgewaysDictionary, sidewards
sidelongDictionary, side, covert
Alfred shot him a sideways glance.
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Covert activities or situations are secret or hidden.
They have been supplying covert military aid to the rebels.
If you describe someone's behaviour as furtive, you disapprove of them behaving as if they want to keep something secret or hidden.
a furtive glance over her shoulder
Thesaurus for sideways from the Collins English Thesaurus
Sideways means from or towards the side of something or someone.