thready

adjective2

1. •
   Of, resembling, or capable of forming a thread; filamentous.

   • The roote is threddy, like the roote of the second kinde of Scrophularia, and is euer[-]lasting, putting forth yearely new springs, as also doth the rootes of the other two Scrophularies. — 1578
2. •
   weak.

   • A pulse throbbed beneath her fingers, thready but present. — 2016