Where does “pedra no sapato” come from?

pedra no sapato (Portuguese) comes from Portuguese no, from Old Portuguese no, from Old Portuguese eno, from Old Portuguese en, from Latin în, from Latin en, from Proto-Italic en, from Proto-Indo-European h₁én — in.

pedra no sapato (Portuguese): a minor but constant problem; an annoyance; Used...

Definitions

a minor but constant problem; an annoyance; Used...

Ancestry of “pedra no sapato”, step by step

pedra no sapato traces back through two separate lines of ancestry.

via Portuguese no

Step	Language	Word	Meaning
1	Portuguese	no	Alternative form of o used as an enclitic...
2	Old Portuguese	no	—
3	Old Portuguese	eno	—
4	Old Portuguese	en	in
5	Latin	în	in, at, on, upon, from (space)
6	Latin	en	lookǃ beholdǃ; reallyǃ?; come onǃ
7	Proto-Italic	en	in
8	Proto-Indo-European	h₁én	in

via Portuguese pedra

Step	Language	Word	Meaning
1	Portuguese	pedra	stone; stone, rock; hailstone
2	Old Portuguese	pedra	rock, stone
3	Latin	petra	stone, rock
4	Ancient Greek	πέτρα	rock formation: cliff, ledge, cave, ridge; stone

Every word from Proto-Indo-European h₁én →Every word from Proto-Italic en →Every word from Latin en →