Etymology: Adapted from *dila’*, the Boie’nen word for "tongue", likely due to the resemblance in shape or function.
Possible senses of "tila’tila’" could include:
1. *Flap-like structures*: general term for parts that resemble a tongue or flap in shape or function.
2. *Flexible or movable parts*: emphasis on the flexibility or movement of the part, like a tongue or flap.
3. *Covering or sealing parts*: specific to parts like rubber check valves, which control flow or seal openings.
The term's adaptation from "dila’" (tongue) suggests a creative extension of meaning to describe various flap-like structures in different contexts.