Modest
What it means
Meaning 1
Not inclined to boast or claim more importance than is deserved.
Reach for it when praising restrained self-presentation without asking someone to hide real achievement
She remained modest while clearly explaining her part in the discovery.
Meaning 2
Limited in size, amount, ambition, or display.
Reach for it when describing a small but real scale without dismissing its value
A modest improvement removed the longest delay in the process.