From The Collaborative International Dictionary of English v.0.48 [gcide]:
Cautiously \Cau"tious*ly\, adv.
In a cautious manner.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
cautiously
adv 1: as if with kid gloves; with caution or prudence or tact;
"she ventured cautiously downstairs"; "they handled the
incident with kid gloves" [syn: cautiously,
carefully] [ant: carelessly, incautiously]
2: in a conservative manner; "we estimated the number of
demonstrators conservatively at 200,000." [syn:
conservatively, cautiously, guardedly]