backward

back rearward

abaft about astern behind in reverse inverted turned around

ahead forward to the front

bashful hesitant shy

afraid averse demure diffident disinclined hesitating humble indisposed loath modest reluctant reserved retiring timid uneager unwilling wavering

aggressive forward unshy

late slow tardy

arrested behind checked delayed underdeveloped undeveloped

developed

advanced precocious

ahead developing

toward the rear

forward