Gazebo

google

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mid 18th century: perhaps humorously from gaze, in imitation of Latin future tenses ending in -ebo : compare with lavabo.

wiktionary

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Possibly from gaze + Latin conjugation ending -ebo (as in videbo); or possibly from Arabic قَصَبَة‎ (qaṣaba) (whence also casbah), refashioned after gaze.

etymonline

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gazebo (n.)

1752, supposedly a facetious formation from gaze + -bo, Latin first person singular future tense suffix (as in videbo "I shall see"), on model of earlier belvedere "cupola," from Italian, literally "a fair sight." But according to OED perhaps rather a corruption of some oriental word.