Careful
Part of speech: adjective
Definition: Full of care or grief; sorrowful, sad. Full of cares or anxiety; worried, troubled. Having care (for); attentive to potential danger, error or harm; cautious. Conscientious and painstaking; meticulous.
Example sentence: A young man who wishes to remain a sound atheist cannot be too careful of his reading.
Provident
Part of speech: adjective
Definition: With care and consideration for the future.