aug-, auc-, auct-, auxano-, auxi-, aux-, auxo-

(Greek > Latin: to increase, to grow; growth)

auxochrome
auxocyte
auxodrome
auxoflore
auxograph (s) (noun), auxographs (pl)
An auxograph is an instrument that records variations in the volume or degree of loudness of sounds.
auxoheterotrophic
auxology
auxometer
auxospore
auxotonic
In botany, induced by growth rather than by external stimulus.
unauthorized