fragile in WordNet English dictionary

1. easily broken or damaged or destroyed
   "a kite too delicate to fly safely"; "fragile porcelain plates"; "fragile old bones"; "a frail craft"
   delicate  fragile  frail 
   
2. lacking substance or significance
   "slight evidence"; "a tenuous argument"; "a thin plot"; a fragile claim to fame"
   flimsy  fragile  slight  tenuous  thin 
   
3. vulnerably delicate
   "she has the fragile beauty of youth"
   fragile