oasis

noun, plural o·a·ses [oh-ey-seez] /oʊˈeɪ siz/.

1. a small fertile or green area in a desert region, usually having a spring or well.
2. something serving as a refuge, relief, or pleasant change from what is usual, annoying, difficult, etc.: The library was an oasis of calm in the hectic city.

noun plural -ses (-siːz)

1. a fertile patch in a desert occurring where the water table approaches or reaches the ground surface
2. a place of peace, safety, or happiness in the midst of trouble or difficulty

noun

1. trademark a block of light porous material, used as a base for flower arrangements

n.1610s, from French oasis (18c.) and directly from Late Latin oasis, from Greek oasis, probably from Hamitic (cf. Coptic wahe, ouahe “oasis,” properly “dwelling place,” from ouih “dwell”). The same Egyptian source produced Arabic wahah. Plural oases (ō-ā′sēz)

1. A small area in a desert that has a supply of water and is able to support vegetation. An oasis forms when groundwater lies close enough to the surface to form a spring or to be reached by wells.