nuclear-powered submarine nuclear-powered submarine /ˈnukliər ˈpaʊərd sʌbməˈrin/

noun

1. A submarine that is propelled by nuclear power  ( nautilus , nuclear submarine , nuclear-powered submarine )
   a submarine that is propelled by nuclear power
   
   

 doubtfulness doubtfulness /ˈdaʊtˌfʊlnəs/

noun

1. Uncertainty about the truth, factuality or existence of something  ( doubtfulness , dubiousness , doubt , question )
   uncertainty about the truth, factuality or existence of something
    The dubiousness of his claim
   the dubiousness of his claim
    There is no question about the validity of the enterprise
   there is no question about the validity of the enterprise
   
   
2. The state of being unsure of something  ( doubtfulness , dubiety , dubiousness , doubt , incertitude , uncertainty )
   the state of being unsure of something
   

 Hebrew Hebrew /ˈhiːbruː/

adjective

1. () Of or relating to or characteristic of the Hebrews  ( Hebraic , Hebraical , Hebrew )
   of or relating to or characteristic of the Hebrews
    The old Hebrew prophets
   the old Hebrew prophets
   
2. Of or relating to the language of the Hebrews  ( Hebraical , Hebrew , Hebraic )
   of or relating to the language of the Hebrews
    Hebrew vowels
   Hebrew vowels
   

noun

1. () The ancient Canaanitic language of the Hebrews that has been revived as the official language of Israel  ( Hebrew language , Hebrew )
   the ancient Canaanitic language of the Hebrews that has been revived as the official language of Israel
    She is learning Hebrew to better understand ancient scriptures.
   She is learning Hebrew to better understand ancient scriptures.
   
   
2. A person belonging to the worldwide group claiming descent from Jacob (or converted to it) and connected by cultural or religious ties  ( Hebrew , Israelite , Jew )
   a person belonging to the worldwide group claiming descent from Jacob (or converted to it) and connected by cultural or religious ties
     The Jewish community celebrated Hanukkah with joy and religious fervor.
   The Jewish community celebrated Hanukkah with joy and religious fervor.
   
   

 auto racing auto racing /ˈɔːtoʊ ˈreɪsɪŋ/

noun

1. The sport of racing automobiles  ( auto racing , car racing )
   the sport of racing automobiles