"roundness" - Translation from English to Arabic

'They used a computer to measure the boiling point'of the Merc's brake fluid'and a gizmo to check the roundness of its tyres.'
'واستخدموا جهاز كمبيوتر ل قياس درجة الغليان 'من زيت الفرامل والحائزات على 'والأداة للتحقق من استدارة من اطاراتها.

His face was not narrow, nor was it fully round but there was a little bit of roundness to it.
قال ان وجهه لم يكن نحيف او مكتمل الإستدارة ولكن كان به شىء من الإستدارة

Detrital mica: Environmental significance of roundness and grain surface textures, Journal of Sedimentary Petrology, Vol. 51, No.1.
Detrital mica: Environmental significance of roundness and grain surface textures, Journal of Sedimentary Petrology, Vol. 51, No.1.

Got my big butt roundness. Right.
مؤخرتي الكبيرة تنير فحسب

She loves my roundness
تحب بريّتي