pilot engine pilot engine /ˈpaɪlət ˈɛndʒɪn/

noun

1. A locomotive that precedes a train to check the track  ( pilot engine )
   a locomotive that precedes a train to check the track
    The pilot engine went ahead to ensure the tracks were clear for the main train.
   The pilot engine went ahead to ensure the tracks were clear for the main train.
   
   

 annual annual /ˈænjuəl/

adjective

1. () (botany) completing its life cycle within a year  ( one-year , annual )
   (botany) completing its life cycle within a year
    A border of annual flowering plants
   a border of annual flowering plants
   
2. Occurring or payable every year  ( annual , yearly )
   occurring or payable every year
    An annual trip to Paris
   an annual trip to Paris
    Yearly medical examinations
   yearly medical examinations
    Annual (or yearly) income
   annual (or yearly) income
   

noun

1. A reference book that is published regularly once every year  ( annual , yearbook , yearly )
   a reference book that is published regularly once every year
   
2. (botany) a plant that completes its entire life cycle within the space of a year  ( annual )
   (botany) a plant that completes its entire life cycle within the space of a year
    I planted some annuals in my garden this year, and they're looking beautiful
   I planted some annuals in my garden this year, and they're looking beautiful
   
   

 gondoliere gondoliere /ˌgɔndəˈliːrə/

noun

1. A (Venetian) boatman who propels a gondola  ( gondolier , gondoliere )
   a (Venetian) boatman who propels a gondola
   
   

 degenerative arthritis degenerative arthritis /dɪˈdʒɛnərətɪv ɑːrˈθraɪtɪs/

noun

1. Chronic breakdown of cartilage in the joints; the most common form of arthritis occurring usually after middle age  ( degenerative arthritis , degenerative joint disease , osteoarthritis )
   chronic breakdown of cartilage in the joints; the most common form of arthritis occurring usually after middle age