PROTRUSILE Antonyms

• curving inward

• lower than previously

• flattened downward as if pressed from above or flattened along the dorsal and ventral surfaces

• filled with melancholy and despondency

• not accessible to view

• designed to elude detection

• difficult to find

• not solid; having a space or gap or cavity

• a cavity or space in something

• a small valley between mountains

• a depression hollowed out of solid matter

• as if echoing in a hollow space

• devoid of significance or force

• lacking in substance or character

• remove the inner part or the core of

• remove the interior of

• having a sunken area

• resembling an alcove

• beneath the surface of the water

• growing or remaining under water

• having a sunken area

• not known

• an unknown and unexplored region

• anyone who does not belong in the environment in which they are found

• a variable whose values are solutions of an equation

• being or having an unknown or unnamed source

• not known to exist

• not famous or acclaimed

• not known before

• an order for goods to be exported or imported

• the space left between the margin and the start of an indented line

• set in from the margin

• cut or tear along an irregular line so that the parts can later be matched for authentication

• make a depression into

• notch the edge of or make jagged

• bind by or as if by indentures, as of an apprentice or servant