Where does “การถอดอักษร” come from?

การถอดอักษร (Thai) comes from Thai ถอดอักษร, from Thai อักษร, from Sanskrit अक्षर, from Sanskrit अ-, from Proto-Indo-Iranian a-, from Proto-Indo-European n̥-, from Proto-Indo-European ne — not.

Ancestry of “การถอดอักษร”, step by step

การถอดอักษร traces back through two separate lines of ancestry.

via Thai ถอดอักษร

Step	Language	Word	Meaning
1	Thai	ถอดอักษร	to transliterate
2	Thai	อักษร	script; letter
3	Sanskrit	अक्षर	imperishable; unalterable; syllable
4	Sanskrit	अ-	un-, not; Used in the formation of imperfect,...
5	Proto-Indo-Iranian	a-	un-, a-
6	Proto-Indo-European	n̥-	not, un-
7	Proto-Indo-European	ne	not

via Thai การ

Step	Language	Word	Meaning
1	Thai	การ	work; matter; task; affair; prefixed to nouns to...
2	Pali	kāra	deed; doing, manner; production, application
3	Sanskrit	कार	gain, prize, booty; contest, war; an act, action
4	Sanskrit	कृ	to make
5	Proto-Indo-European	kʷer-	to do; to make; to build

Every word from Proto-Indo-European ne →Every word from Sanskrit अ- →Every word from Proto-Indo-European n̥- →