Where does “lentokirjanen” come from?

lentokirjanen (Finnish) comes from Finnish lento, from Italian lento, from Spanish lento, from Galician -ura, from Latin -ura, from Latin -tūra — ing, -ure, -work.

Ancestry of “lentokirjanen”, step by step

lentokirjanen traces back through two separate lines of ancestry.

via Finnish lento

Step	Language	Word	Meaning
1	Finnish	lento	flying, flight; flight; lento
2	Italian	lento	slow
3	Spanish	lento	slow
4	Galician	-ura	-ness
5	Latin	-ura	Suffix forming abstract nouns from adjectives
6	Latin	-tūra	ing, -ure, -work

via Finnish kirjanen

Step	Language	Word	Meaning
1	Finnish	kirjanen	booklet
2	Finnish	-nen	Forms diminutives nouns or terms expressing...
3	Finnish	-inen	-like, -ous, -y; -en; Creates adjectives from...
4	Finnish	-uus	Forms nouns from adjectives, expressing a quality
5	Proto-Finnic	-uc	-ness, -hood

Every word from Latin -tūra →Every word from Galician -ura →Every word from Spanish lento →