Apt
Definition 1 of 4
Pro Tip 1/3
Expectations of Behavior
Use 'apt' to express a future action seen as characteristic based on past behavior. He's apt to forget his keys.
Pro Tip 2/3
Subtle Probability
'Apt' indicates a good chance of something happening, but not certainty. Travelers are apt to face delays during the storm.
Pro Tip 3/3
Personal Tendency
Use it to hint at someone's tendencies without being derogatory. Children are apt to be playful.