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rendezvous - An arrangement to meet somebody at a particular time and place, especially between people who have great affection towards each other.
After Romeo and Juliet met at the masked ball, they arranged a rendezvous in the garden to continue their relationship.
paradox - A situation or idea that seems strange because it involves two aspects that are very different and seem to contradict each other, and both may be true.
It's a paradox that often it's the busiest people that have to most time to contribute to the needs of others.