left straight narrow (verb) backslide: go astray
Sinonime: basal,
capital,
central,
chief, elemental, essential, indispensable,
inherent, intrinsic,
key,
main, necessary, primary, primitive,
principal, radical, substratal,
underlying, vital
Antonime: additional,
extra, inessential, nonessential,
outside,
peripheral, secondary