People can be submissive at any age.
If the question refers to the sexual practice, one must have reached the legal age of majority in your state before getting involved in any sort of sexual practice.
As sub/dom play carries so many risks, and depends so much on trust, it is strongly recommended that those who wish to carry out this sort of practice should be a little older than simple majority; when one has reached the age of 25 one is somewhat better able to judge the risks and people involved, and 30 is better still. However, there is no real minimum age, other than the statutory minimum.
Either become submissive, try and talk him to submission or leave him.
the young dog was submissive to the leader of the pack
They should be submissive to God.
To my knowledge I believe she would be submissive to him but if he were to become violent, she would most likely fight back. Then again, she might not be interested at all and not be submissive... I'm not 100% on this one!
The citizens were tired and submissive.
Slightly more due to their submissive past in eastern asia, where women had a more submissive role.
Filipino translation of submissive: mababang loob
to submit
mababang loob
"Ponyboy gave a submissive look." is the sentence
Is Christ Jesus submissive in His duty to God? Yes.
Docile or compliant would be good synonyms for submissive.