soundness

noun
1
the quality of being sensible; the fact that something can be relied on and will probably give good results
درستی, صحت, استواری, معقولیت
opposite unsoundness(1)
2
the quality of being good, detailed and complete
درستی, صحت, کمال, معقولیت
He had confidence in the soundness of his understanding of physics.
3
the fact of being in good condition; the fact of not being damaged, hurt, etc.
سلامت, بی‌عیبی, استحکام, عدم آسیب‌دیدگی, حالت خوب
the soundness of the building’s foundations
opposite unsoundness(2)