Reedy
fragile or frail
Frail.
slender
There is one syllable in the word frail
He was very frail, frail meaning weak.
slim or thin
Yes, "frail" does not have a suffix. It is a standalone word.
The word "frail" is an adjective that describes someone or something that is delicate or weak.
other words for weak are feeble, frail, fragile, infirm, decrepit, debilitated.
bleak word frail quail
Towards the end of her life, my grandmother was very frail.
"Frail" comes from the Latin word fragilis, "breakable", via Old French frele. Fragilis in turn comes from the verb frangere, "to break". Believe it or not, frangere and "break" (and thus "frail" and "breakable") are related: they ultimately both come from the Proto-Indo-European root bhreg.