Where does “Trucial States” come from?

Trucial States (English) comes from English trucial, from English truce, from Middle English trewes, from Middle English trewe, from Old English trēowa, from Old English trēow, from Proto-West Germanic treu, from Proto-Germanic trewą — hard, firm, strong, solid; hard, fast; tree.

Ancestry of “Trucial States”, step by step

Trucial States traces back through 3 separate lines of ancestry.

via English trucial

Step	Language	Word	Meaning
1	English	trucial	Of or pertaining to a truce; specifically, to the...
2	English	truce	a period of time in which no fighting takes place...
3	Middle English	trewes	—
4	Middle English	trewe	Faithful, loyal, trustworthy; Concerned about...
5	Old English	trēowa	—
6	Old English	trēow	tree, wood, timber, beam, log, stake, stick,...
7	Proto-West Germanic	treu	tree; wood
8	Proto-Germanic	trewą	tree
9	English	doru	Alternative form of dory
10	Ancient Greek	δόρυ	wood, tree, stem; spear shaft, spear, lance,...
11	Proto-Hellenic	dóru	tree
12	Proto-Indo-European	dóru	tree
13	Proto-Indo-European	drew-	hard, firm, strong, solid; hard, fast; tree

via English [[state

Step	Language	Word	Meaning
1	English	[[state	—

via English states]]

Step	Language	Word	Meaning
1	English	states]]	—

Every word from Proto-Indo-European drew- →