pikkajalises
Pikkajalises is an Estonian grammatical form: it is the inessive singular of the adjective pikkajaline, which means long-tailed. In usage, pikkajalises functions as a modifier describing a noun in the inessive case (for example, indicating “in a long-tailed [something]”). As a word form, it is not a separate concept or term by itself, but rather a grammatical inflection that occurs when describing something that is long-tailed and being positioned or described within a larger phrase governed by the inessive case.
In Estonian, adjectives agree with the nouns they modify in number and case. The inessive singular ending
Usage notes: because pikkajaline describes a tail-related trait, pikkajalises is most likely to be found in
Etymology and formation are straightforward in Estonian: pikkajaliline is formed from pikk (long) and the tail-related
See also: Estonian grammar, adjectives, inessive case, long-tailed as a descriptive trait.