The last word of your mother tongue you have learnt ?

[linguoboy]

whitlow an infection under the cuticle of a finger or toe

[linguoboy]

gafiate to leave fandom (from GAFIA "Get Away From It All")

[Gormur]

English: fife pipe (probably a term for the piccolo)
Norwegian: strie burlap

[Dormouse559]

avoirdupois n - weight, heaviness

It's borrowed from Old French, but since French spelling has moved on, it now reads as "having some pea(s)".

[Gormur]

English: obtrude to force into
Norwegian: gebyr surcharge

[Brzeczyszczykiewicz]

siguemepollo - A ribbon that hangs from the back, worn in the past by women as an ornament.

(Literally, it means "follow me, chicken", but it's also translated thus "follow me, boy", since the Spanish word "pollo" is also a colloquial term (admittedly scarcely used) for a young man.

Here are some examples of "siguemepollos":

[Gormur]

English: whippet a small, fast dog
Norwegian: eldreinstitusjon old folks' home [infirmary]

[linguoboy]

ancap anarcho-capitalist

[linguoboy]

spalting staining of wood from the growth of fungi

[Brzeczyszczykiewicz]

deixis / deíxis - It's written the same way in English and it refers to the pointing or specifying function of some words, such as "here", "there", "last month" and "these".

[Gormur]

Norwegian: reliabel

I think this is a dialect issue rather than an English influence. I would use it like han er en reliabel fyr (he's a reliable fellow) even though the dictionary tells me it's used for efficient machinery, not listing another usage

Pålitelig is the normal word for all these. Except I'd feel more comfortable using it with reference to machines and other non-human processes

Dialects get complicated when there's nothing written about or in them

English: [to] dun to collect a debt

[linguoboy]

English: [to] dun to collect a debt

I almost never encountre the verb but "dunning letter" used to be common for a letter from a collection agency.

sally port an entryway with two doors or gates, one of which must be locked before the other can be opened

[Gormur]

English: shuck husk
Norwegian: bookmaker

I should've known bookmaker even though it doesn't exist here I like horse racing. My cousin is a commentator for TVG and travels the world but I just now caught on to this term even in English

[razlem]

English: [n] stevedore /ˈstiːvɪˌdɔːr/ a waterfront manual laborer who is involved in loading and unloading ships, trucks, trains or airplanes. From PT "estivador"

[razlem]

English: [adj] copacetic /kəʊ.pəˈsɛt.ɪk/ Fine, excellent, OK.
Unknown etymology

[Dormouse559]

stevedore

copacetic

Where are you finding all these fun words today?

[Car]

English: [adj] copacetic /kəʊ.pəˈsɛt.ɪk/ Fine, excellent, OK.
Unknown etymology

Thanks for the detailed posts!

[Gormur]

bumboat a smaller vessel bringing provisions to moored ships
audiens [polit.] audience

[razlem]

Where are you finding all these fun words today?

Idk! Just happened to both show up that day lol.

[linguoboy]

I was quite surprised to come across a Wiktionary entry for "coon eyes" today. It's not a term I recall hearing in English and, moreover, it's not a term I can imagine anyone I know using because "coon" is an anti-Black slur. Supposedly, this is a shortening of "raccoon eyes", but IME that term is most commonly used to describe the black marks left by crying while wearing heavy mascara or other eye makeup, whereas the definition of "coon eyes" refers to a natural discoloration causing by blunt trauma or lack or sleep.