Where does “остроконечный” come from?

остроконечный (Russian) comes from Russian о́стрый, from Proto-Slavic ostrъ, from Proto-Balto-Slavic aśras, from Proto-Indo-European *h₂eḱrós, from Proto-Indo-European h₂eḱ- — sharp.

остроконечный (Russian): sharp-pointed, pointed

Definitions

sharp-pointed, pointed

Ancestry of “остроконечный”, step by step

остроконечный traces back through two separate lines of ancestry.

via Russian о́стрый

Step	Language	Word	Meaning
1	Russian	о́стрый	pointed, sharp; sharp, pointed
2	Proto-Slavic	ostrъ	sharp
3	Proto-Balto-Slavic	aśras	sharp
4	Proto-Indo-European	*h₂eḱrós	sharp
5	Proto-Indo-European	h₂eḱ-	sharp

via Russian коне́ц

Step	Language	Word	Meaning
1	Russian	коне́ц	end
2	Old East Slavic	коньць	end; edge, border
3	Proto-Slavic	konьcь	end; thread, string
4	Proto-Slavic	konъ	beginning; end
5	Proto-Slavic	čęti	to begin

Every word from Proto-Indo-European h₂eḱ- →Every word from Proto-Indo-European *h₂eḱrós →Every word from Proto-Balto-Slavic aśras →