ruining
v. B1 Intermediate US //ˈɹuɪnɪŋ// UK //ɹˈuːɪnɪŋ// ru·in·ing
v. spoiling something completely so that it is no longer useful, beautiful, or enjoyable. You use this when something is destroyed or made much worse.
v. causing the complete loss, destruction, or decay of something; making something severely damaged or ineffective. The present participle form of 'ruin'.
The heavy rain is ruining our picnic.
Constant interruptions are ruining my concentration while I try to finish this report.
The construction of the massive highway is ruining the quiet atmosphere of the valley, driving away both the local wildlife and the tourists who once visited for the peace.
Usage
The verb is transitive and requires a direct object.