touching a surface very lightly and momentarily, similar to a dragonfly skimming water

To overestimate one's capabilities; literally, a dragonfly trying to shake a stone pillar.

Odonata, the order of insects consisting of dragonflies and damselflies.

the sword moves with the speed and precision of a dragonfly

Odonata, order consisting of about 6,000 species of dragonflies and damselflies

a slender predatory insect of the suborder Zygoptera, related to the dragonfly but typically smaller