Adjective

(en adjective)

of lower quality

Anna had always felt inferior to her brother due to poor school grades.

* Dryden

Whether they are equal or inferior to my other poems, an author is the most improper judge.

of lower rank

an inferior officer

located below

# (typography) Printed in subscript.

an inferior figure or letter

(botany) Situated below some other organ; said of a calyx when free from the ovary, and therefore below it, or of an ovary with an adherent and therefore inferior calyx.

(botany) On the side of a flower which is next to the bract; anterior.

(astronomy) Nearer to the Sun than the Earth is.

the inferior''' or interior planets; an '''inferior conjunction of Mercury or Venus

(astronomy) Below the horizon.

the inferior part of a meridian

Adjective

(en adjective)

Not secure.

Not comfortable or confident in oneself or in certain situations.

*{{quote-book, year=1963, author=(Margery Allingham)

, title=(The China Governess) , chapter=1 citation , passage=The half-dozen pieces […] were painted white and carved with festoons of flowers, birds and cupids. […]  The bed was the most extravagant piece.  Its graceful cane halftester rose high towards the cornice and was so festooned in carved white wood that the effect was positively insecure , as if the great couch were trimmed with icing sugar.}}

He's a nice guy and all, but seems to be rather insecure around other people.