The Collaborative International Dictionary of English v.0.48:
Straiten \Strait"en\, v. t. [imp. & p. p. Straitened; p. pr. &
vb. n. Straitening.]
1. To make strait; to make narrow; hence, to contract; to
confine.
[1913 Webster]
Waters, when straitened, as at the falls of bridges,
give a roaring noise. --Bacon.
[1913 Webster]
In narrow circuit, straitened by a foe. --Milton.
[1913 Webster]
2. To make tense, or tight; to tighten.
[1913 Webster]
They straiten at each end the cord. --Pope.
[1913 Webster]
3. To restrict; to distress or embarrass in respect of means
or conditions of life; -- used chiefly in the past
participle; -- as, a man straitened in his circumstances.
[1913 Webster]
Moby Thesaurus II by Grady Ward, 1.0:
103 Moby Thesaurus words for "straitened":
Lenten, Spartan, abstemious, ascetic, austere, badly off, bound,
bounded, conditioned, confined, copyrighted, cramped, desperate,
destitute, disciplined, distressed, down to bedrock, dwarfed,
dwarfish, embarrassed, exiguous, feeling the pinch, finite, frugal,
hard pressed, hard up, ill off, impecunious, impoverished,
in Queer Street, in desperate straits, in extremis, in extremities,
in narrow circumstances, in reduced circumstances,
in straitened circumstances, inadequate, indigent, insolvent,
insufficient, jejune, land-poor, lean, limited, meager, mean,
miserly, moderated, narrow, necessitous, needy, niggardly,
on the edge, oppressed, out of pocket, paltry, parsimonious,
patented, penniless, pinched, poor, poorly off, poverty-stricken,
prescribed, proscribed, puny, qualified, reduced, restricted,
scant, scanty, scrawny, scrimp, scrimpy, short, short of cash,
short of funds, short of money, skimp, skimpy, slender, slight,
slim, small, sorely pressed, spare, sparing, squeezed, starvation,
stingy, stinted, strait, strapped, stunted, subsistence, thin,
unmoneyed, unnourishing, unnutritious, unprosperous, up against it,
watered, watery