In a secretive manner.
In secret, covertly.
‘Mary cheated secretly in the test, and never got caught.’;
in a secretive manner; with a preference for secrecy;
‘the teacher raised a hand to him, slightly and secretively, because he was her favorite’;
In a secret manner.
in secrecy; not openly;
‘met secretly to discuss the invasion plans’; ‘the children secretly went to the movies when they were supposed to be at the library’; ‘they arranged to meet in secret’;
not openly; inwardly;
‘they were secretly delighted at his embarrassment’; ‘hoped secretly she would change her mind’;