certain
adjective
adjective
determiner
pronoun
certainly
adverb
interjection
maintain
verb
verb
verb
verb
contain
verb
-
contain, containing, contains, contained
verb
-
contain, containing, contains, contained
verb
-
contain, containing, contains, contained
mountain
noun
noun
captain
noun
noun
noun
noun
verb
obtain
verb
verb
retain
verb
verb
verb
verb
sustain
verb
verb
verb
noun
verb
container
noun
noun
noun
uncertainty
noun
-
uncertainty, uncertainties
noun
-
uncertainty, uncertainties
noun
-
uncertainty, uncertainties
sustainable
adjective
adjective
curtain
noun
noun
noun
verb
-
curtain, curtaining, curtains, curtained
