strictly speaking

Being totally accurate

dumtaxat

Adverb [Cite]

• (Classical) IPA^(key): /dumˈtak.sat/, [d̪ʊn̪ˈt̪äks̠ät̪]
• (Ecclesiastical) IPA^(key): /dumˈtak.sat/, [d̪umˈt̪äksät̪]‎‎

Etymology:

dum + taxat

References:

"dumtaxat". In: Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford, Clarendon Press