עָשַׂר , Pi. עִשֵּׂר (b. h.; 1) to give one-tenth, separate tithes. Sabb. 119ᵃ עַשִּׁר וכ׳, v. עָשַׁר. Maasr. IV, 2 ושכחו לעַשְּׂרָן but had forgotten to pay the tithe of them. Sabb. II, 7 עִשַּׂרְתֶּם have you set aside tithes (of what you intend to use for the Sabbath)? Ib. ספק … אין מְעַשְּׂרִין את הודאי if it is doubtful whether or not night has set in, you must not separate the tithes of what is sure to be subject to tithes (v. דְּמַאי); a. v. fr.—Part. pass. מְעוּשָּׂר; f. מְעוּשֶּׂרֶת; pl. מְעוּשָּׂרִים, מְעוּשָּׂרִין; מְעוּשָּׂרוֹת. Bekh. IX, 7 (קפץ אחד) מן המע׳ לתוכן if one of those (lambs) which have been set aside as tithe, leaped among the flock. Ib. הרי אלו מע׳ they (the flock) are considered as tithed; a. fr. —2) to reduce to one-tenth. Cant. R. to VII, 11, v. עָשַׁר.
    Nif. - נֶעֱשַׂר,
    Hithpa. - הִתְעַשֵּׂר, , Nithpa. נִתְעַשֵּׂר to be tithed. Maasr. l. c. עד שיֵעָשְׂרוּ (Ms. M. שיִתְעַשְּׂרוּ) until they are tithed. Ib. 5 מִתְעַשֶּׂרֶת זרע וכ׳ must be tithed as seed, as vegetables (if the leaves are used) &c. Bekh. IX, 1 ואינן מִתְעַשְּׂרִים מזה על זה and they (large cattle and small cattle) cannot be tithed one for the other. Ib. 53ᵇ אין דין שיִתְעַשְּׂרוּ זה מזה should we not conclude that they may be tithed one for the other?; a. fr.