だんだん
gradually; by degrees; little by little; more and more; increasingly
It will get warmer and warmer.
・grade
・steps
・stairs
steps;stairs;staircase;terrace
だんだんばたけ
terraced fields;terraced farm
ぎざぎざ
notches;serration;indentation;jaggies (stair-step artifacts in computer images)
notched;serrated;jagged;corrugated;milled