grad-, -grade, -gred, -gree, -gress (Latin: walk, step, take steps, move around; walking or stepping).aggradation: 
aggression: 
aggressive: 
aggressor: 
biodegradable: 
centigrade: 
congress: 
congressional: 
degradation: 
degrade: 
degree: 
digitigrade: 
Walking on the toes or digits.
 
digress: 
digression: 
egress: 
gradate: 
gradation: 
gradational: 
grade: 
grades: 
gradient: 
gradual: 
gradualism: 
gradually: 
graduate: 
graduated: 
graduation: 
ingredient: 
ingress: 
pinnigrade: 
plantigrade: 
Walking upon the soles of the feet.
 
progress: 
progression: 
progressive: 
pronograde: 
regress: 
regression: 
regressive: 
retrogradation: 
retrograde: 
retrogress: 
retrogression: 
saltigrade: 
tardigrade: 
Moving slowly; a reference to sloths.
 
transgress: 
transgressed: 
transgression: 
transgressor: 
unguligrade: 
Moving on the tips of the digits.
 
vermigrade: 
Moving in a wormlike manner.
 
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