self-effacing

noun

1. the act or fact of keeping oneself in the background, as in humility.

adjective

1. tending to make oneself, one’s actions, etc, inconspicuous, esp because of humility or timidity; modest

noun

1. the act of making oneself, one’s actions, etc, inconspicuous, esp because of humility or timidity

adj.1902, from self- + effacing (see efface). Self-effacement is recorded from 1866.