Popularly: a wordless, meaningful look shared by two people, each wishing the other would initiate something both desire but neither wants to begin..
Popularly: a wordless, meaningful look shared by two people, each wishing the other would initiate something both desire but neither wants to begin.
The eye-contact / romance element is not clearly in the morphology; it comes from a missionary's free, illustrative gloss. Sometimes cited in game theory for the “volunteer's dilemma.”
Per linguist Yoram Meroz, closer to “to make each other feel awkward / be at a loss what to do next” — the romantic “look across the table” reading is a Western overlay.
Reflexive/passive prefix + root iłapi “at a loss / awkward” + stative/aspectual + dual reciprocal suffix.
Popularized after Thomas Bridges (19th-c. missionary-linguist) glossed it; Guinness (1994) called it the “most succinct word”; it spread online from the late 2000s.
HEAVILY ROMANTICIZED: The popular romantic definition is largely a modern Western reinterpretation. The word does not appear in Bridges' published Yaghan dictionary — the famous gloss came from an essay/preface. Linguists note Bridges “was sometimes prone to exoticising the language.” The last fluent speaker did not recognize the word when asked (though that proves little). Treat the “most succinct / untranslatable” framing as a linguistic urban legend.