Basic (2-6)
'basic' is the definition.
(similar in meaning)
This is the entire clue.
(Other definitions for fundamental that I've seen before include "key" , "Basic" , "Primary" , "Of central importance" .)
'basic' is the definition.
(similar in meaning)
This is the entire clue.
(Other definitions for rudimentary that I've seen before include "Undeveloped" , "Immature" , "in the early stages" , "Primitive" , "Limited to basics" .)
'basic' is the definition.
(similar in meaning)
This is the entire clue.
(Other definitions for radical that I've seen before include "Thoroughgoing - (popularly) extremist" , "Holding extreme political views" , "Extreme, ultra" , "Primitive" , "Drastic or thorough as changes may be" .)
'basic' is the definition.
(I know that basic can be written as staple)
This is all the clue.
(Other definitions for staple that I've seen before include "Clip" , "Fasten with short U-shaped bits of wire" , "Short U-shaped paper fastener" , "Fundamental" , "Paper pin for plates" .)
'basic' is the definition.
(I know that basic can be written as simple)
This is all the clue.
(Other definitions for simple that I've seen before include "Effortless" , "A piece of cake" , "Easy or uncomplicated" , "The sort of interest" , "Easy; herb" .)
'basic' is the definition.
(synonyms)
This is all the clue.
(Other definitions for elemental that I've seen before include "Let me lean like forces of nature" , "radical" , "of fire, say" , "Rising trend" , "Related to the powers of nature" .)
'basic' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for elementary that I've seen before include "No problem" , "Easy" , "Basic, simple" , "schooling?" , "ABC!" .)
'basic' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for no-frills that I've seen before include "Essential" , "Straightforward" , "Plain" , "Basic (colloq.)" , "Without any extras - fins roll (anag)" .)