Where does “casingless” come from?

casingless (English) comes from English casing, from English case, from Middle English cas, from Old French cas, from Latin cāsus, from Proto-Indo-European ḱad- — to fall.

casingless (English): Without a casing

Definitions

Without a casing

Ancestry of “casingless”, step by step

casingless traces back through two separate lines of ancestry.

via English casing

Step	Language	Word	Meaning
1	English	casing	That which encloses or encases; The decorative...
2	English	case	An actual event, situation, or fact; A given...
3	Middle English	cas	case
4	Old French	cas	an event
5	Latin	cāsus	—
6	Proto-Indo-European	ḱad-	to fall

via English less

Step	Language	Word	Meaning
1	English	less	To a smaller extent or degree; comparative form...
2	Middle English	les	false; lying; deceptive; falsehood; a lie
3	Old English	lēas	false, lax; false, void, loose; devoid of, loose...
4	Proto-Germanic	*laus	—

Every word from Proto-Indo-European ḱad- →Every word from Latin cāsus →Every word from Old French cas →