transitive verb to make accustomed to.He habituated himself to the idea of moving again. See the full entry

adjective of or pertaining to migration or an act of migrating.The Siberian crane is a migratory bird. See the full entry

adjective not existing; not having substance in reality.Injury seemed to be nonexistent although his pain was very real.Her parents asked about her friends at the new school, not knowing they were nonexistent….

noun one who usually or in a specific instance expects a good outcome. (Cf. pessimist.)How can you be such an optimist with all these troubles in the world?I had given up all…

noun worshipful devotion to and veneration of God or family; piousness.They were aware of their daughter’s piety, and yet it surprised them when she announced that she would become a nun. See…