Hope you’re doing well too :)
Vocabulary specific to a subject is called technical vocabulary. For example: A Year 1 science unit on living things may require words that are not yet part of students' vocabulary – habitat, prey, offspring.
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Love is the answer you are looking for. Orsino is in love with Olivia. Olivia is in love with Cesario. Viola is in love with Orsino. Therefore your answer is Love.
A peasant boy waits in the forest to escape with the king's daughter and wonders if his love is strong enough to keep her happy