Lexical Definition

‎עָשַׂר‎ ʻâsar (aw-sar') to tithe H:V
a primitive root (identical with ‎עָשַׁר‎); to accumulate; but used only as denominative from ‎עֶשֶׂר‎

[idiom] surely, give (take) the tenth, (have, take) tithe(-ing, -s), [idiom] truly.

1) to tithe, take the tenth part of, give a tithe, take a tithe
1a) (Qal) to tithe
1b) (Piel) to give a tithe
1c) (Hiphil) to take a tithe

See Greek: δεκατόω

Usage: 8 forms in 9 verses
Form Translated As     In Verse(s)
תְּעַשֵּׂ֔ר you will tithe Deut.14.22
עַשֵּׂ֣ר fully Deut.14.22
עַשֵּׂ֖ר fully Gen.28.22
לַ֠עְשֵׂר to tithe Deut.26.12
יַעְשֹׂ֑ר he will take a tenth 1Sam.8.151Sam.8.17
הַֽמְעַשְּׂרִ֔ים the collect tithes Neh.10.37
בַּעְשֵׂ֣ר when collect tithes Neh.10.38
אֲעַשְּׂרֶ֥נּוּ I will tithe it Gen.28.22

Brown-Driver-Briggs

[‎עָשַׂר‎] verb denominative take the tenth of, tithe; —

Qal Imperfect 3 masculine singular ‎יַעְשׂר‎ 1Sam 8:15; 1Sam 8:17 (with accusative of thing tithed). Pi`el Imperfect + Infinitive absolute give a tenth of, with accusative of thing: 2 masculine singular ‎עַשֵּׂר תְּעַשֵּׂר‎ Deut 14:22 1 singular ‎עַשֵּׂר אֲעַשְּׂרֶנּוּ לָ֑ח‎ Gen 28:22 (P); Participle taking the tenth, ‎הַמְעַשְּׂרִים‎ Neh 10:38*. Hiph`il (so usually explained) Infinitive ‎לַעְשֵׂר‎ Deut 26:12 with accusative of congnate meaning with verb i.e. taking, reckoning, tithe, but Infinitive construct with ‎ֵ֯‎ improbable, < read ‎לְעַשֵּׂר‎ Pi`el; ‎בַּעְשֵׂר‎ Neh 10:39* absolute, i.e. receiving tithes, but read probably ‎בַּעְשׂר‎ Qal (on anomalous points, see Ges«GKC:53k»§ 53k DrDeut 26:12).

Brown-Driver-Briggs References

Book Refs
Genesis 28:22
Deuteronomy 14:22 · 26:12
1 Samuel 8:15 · 8:17
Nehemiah 10:38* · 10:39*