मानसार शिल्पशास्त्र (प्रसन्ना कुमार आचार्य - प्राचीन भारतीय स्थापत्य, नगर-नियोजन व मूर्ति-शिल्प महाकोश)

. It is (इस).
Before the parentheses:
श-ि-र-ो-न-ा-ह-स-ह or शिरोनासह?
Look at the letter after ना: it is clearly 'स'! Wait, or 'ह'?
Wait, look at the font's 'ह' vs 'स':
'स' has a left part like 'र', then a horizontal bar to the vertical stem.
In line 24: after 'ना':
There is a letter with a vertical stem?
Wait, let's look at: श ि र ो न ा ह स ह
Wait, letter after ना has no vertical stem? No, it looks like 'ह'!
Wait, then the next letter: 'स'!
Then the next letter: 'ह'?
Wait, why would it be 'सह(इस)'?
Ah! Typo in original text, corrected in brackets:
Original: ...ह... correction: (इस) or vice versa?
Wait, could it be "शिरोनाहसह(इस)मोदयम्" or "शिरोनासह(इस)मोदयम्"?
Wait, look at line 3: "करण्डमकुटन्वित(ण्डं च शिरस्क)म् ।" - the brackets give a variant reading or correction!
In line 7: "विन्यस्य(सेद्)" -> 'स्य' corrected to/variant '(सेद्)'.
In line 9: "तदेवकल(बालक)चूडे