tempestuous, undulate, coalesce

If something such as a ​relationship or ​time is tempestuous, it is ​full of ​strong ​emotions:They got ​divorced in 2010 after a tempestuous ​marriage.
 ​violently ​emotional:They ​finally ​stopped ​seeing each other, ​ending ​their tempestuous ​relationship.
(감정이) 열렬한[격정적인]
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to have a ​continuous up and down ​shape or ​movement, like ​waves on the ​sea:The ​road undulates for five ​miles before a ​steep ​climb.the undulating ​countryside
굴곡이 지다,  굽이 지다.
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to ​combine into a ​single ​group or thing:[I] The ​theory is that ​galaxies coalesced from ​smaller groupings of ​stars.