﴿ قَالَ رَبِّ أَنَّىٰ يَكُونُ لِى غُلَٰمٌۭ وَكَانَتِ ٱمْرَأَتِى عَاقِرًۭا وَقَدْ بَلَغْتُ مِنَ ٱلْكِبَرِ عِتِيًّۭا ﴾

“[Zachariah] exclaimed: "O my Sustainer! How can I have a son when my wife has always been barren and I have become utterly infirm through old age?"”

The word عِتِيًّا is derived from which actually means 'unresponsive' or 'insensitive', and in the present context it means dryness of the bones.