有るか無きか

あるかなきか

so slight as to be all but non-existent

無事か

ぶじか

(are you) alright?, (are you) OK?

無くなる

なくなる

to be lost (e.g. luggage), to be missing

無にする

むにする

to bring to naught, to bring to nought, to waste

有る無し

あるなし

presence or absence, whether something is there or not, whether something happens or not

無念がる

むねんがる

to regret

無うなる

のうなる

to be lost (e.g. luggage), to be missing

無かろう

probably not so

しか無い

しかない

having no choice but to...; all one can do is...; there's nothing to do except...

無

む ぶ

un-, non-

無味無臭無色

むみむしゅうむしょく

tasteless, odorless and colorless

無為無策

むいむさく

do-nothing, plan-nothing (government, etc.)

無念無想

むねんむそう

free from worldly or worthless thoughts

無想無念

むそうむねん

being free from all distracting thoughts, keeping one's mind clear of all worldly thoughts, being free from all ideas and thoughts

無味無臭

むみむしゅう

tasteless and odorless, bland

無始無終

むしむしゅう むしむじゅう

everlastingness

無位無官

むいむかん

(an ordinary citizen) having no special rank or title

無理無体

むりむたい

by force

無芸無能

むげいむのう

talentless and imcompetent, incompetent and unaccomplished