无足轻重

insignificant

not to have / no / none / not / to lack / un- / -less

excessive

foot / to be sufficient / ample

light / easy / gentle / soft / reckless / unimportant / frivolous / small in number / unstressed / neutral / to disparage

severity (of the case) / degree of seriousness / whether sth is slight or serious

to repeat / repetition / again / re- / classifier: layer

heavy / serious / to attach importance to