carefulness
Concise Oxford English Dictionary © 2008 Oxford University Press:
careful/ˈkeəfl/
▶adjective
- 1 taking care to avoid mishap or harm; cautious.
■ (careful of/about) protective of.
■ (careful with) prudent in the use of.
- 2 done with or showing thought and attention.
– derivatives
carefully adverb,
carefulness noun.
carefully adverb,
carefulness noun.
'carefulness' also found in these Oxford entries:

