careful
adjective
exercising caution or showing care or attention
“they were careful when crossing the busy street”
“be careful to keep her shoes clean”
Oppositescarelesscautiously attentive
“careful of her feelings”
“heedful of his father's advice”
Synonymsheedfulunhurried and with care and dignity
“walking at the same measured pace”
“with all deliberate speed”
full of cares or anxiety
“Thou art careful and troubled about many things”
mindful of the future in spending money
“careful with money”
Synonymsthrifty
Source: WordNet 3.1, Princeton University