"fragilest" in the adjective sense
1. delicate, fragile, frail
easily broken or damaged or destroyed
"a kite too delicate to fly safely"
"fragile porcelain plates"
"fragile old bones"
"a frail craft"
2. fragile
vulnerably delicate
"she has the fragile beauty of youth"
3. flimsy, fragile, slight, tenuous, thin
lacking substance or significance
"slight evidence"
"a tenuous argument"
"a thin plot"
"a fragile claim to fame"
Source: WordNet® (An amazing lexical database of English)
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