immortal immortal /ˌɪˈmɔrtəl/

adjective

1. () Not subject to death  ( immortal )
   not subject to death
     The mythological creatures were said to be immortal.
   The mythological creatures were said to be immortal.
   

noun

1. Any supernatural being worshipped as controlling some part of the world or some aspect of life or who is the personification of a force  ( immortal , deity , divinity , god )
   any supernatural being worshipped as controlling some part of the world or some aspect of life or who is the personification of a force
     The theologian devoted his life to the study of divinity and religious philosophy.
   The theologian devoted his life to the study of divinity and religious philosophy.
   
   
2. A person (such as an author) of enduring fame  ( immortal )
   a person (such as an author) of enduring fame
    Shakespeare is one of the immortals
   Shakespeare is one of the immortals
   

 Sir Arthur Conan Doyle Sir Arthur Conan Doyle /sɪr ˈɑːrθər ˈkoʊnən doɪl/

noun

1. British author who created Sherlock Holmes (1859-1930)  ( A. Conan Doyle , Arthur Conan Doyle , Conan Doyle , Sir Arthur Conan Doyle )
   British author who created Sherlock Holmes (1859-1930)
   
   

 panpipe panpipe /ˈpænpaɪp/

noun

1. A primitive wind instrument consisting of several parallel pipes bound together  ( pandean pipe , panpipe , syrinx )
   a primitive wind instrument consisting of several parallel pipes bound together
   
   

 additive additive /ˈædətɪv/

adjective

1. Characterized or produced by addition  ( additive )
   characterized or produced by addition
    An additive process
   an additive process
   
2. (mathematics) designating or involving an equation whose terms are of the first degree  ( additive , linear )
   (mathematics) designating or involving an equation whose terms are of the first degree
   

noun

1. () Something added to enhance food, gasoline, paint or medicine  ( additive )
   something added to enhance food, gasoline, paint or medicine
     The food additive enhances the flavor of the dish.
   The food additive enhances the flavor of the dish.