燃やす
adult
age
beginnings
biology
burnt
change
concept
conceptual
danger
development
different
evolution
fire
flame
flammable
generations
grow
growth
healthy
heat
human
idea
ignition
life
live
macro
match
matchstick
object
oldman
people
period
phase
plant
root
safety
senility
sparks
stage
stick
teenager
temperature
time
unusual
various
wood
wooden
young
youth