וּבוֹעַז סְלֵיק לִתְרַע בֵּית דִּינָא דְּסַנְהֶדְּרִין וִיתֵיב תַּמָּן עִם סָבַיָּא וְהָא פָּרִיקָא חֲלַף דְּמַלֵּיל בּוֹעַז לְרוּת וַאֲמַר סְטִי תִּיב הָכָא גְּבַר דִּצְנִיעָן אוֹרְחָתֵיהּ וּסְטָא וִיתִיב.
1. the gate | הַשַּׁעַר – In the time of Tanakh, the gates of the city were the site of business transactions and court proceedings (see Targum).
2. Turn aside, sit here | סוּרָה שְׁבָה – These two words are formulated in the imperative, but have an additional "ה" at the end (known as a paragogic ה suffix) whose function might be purely aesthetic, or to express some sort of emphasis or change in sense. In this case it might soften the imperative from an active command to a request. The form is found in many other places. See, for example verse 4 here ("הַגִּידָה לִּי"), Bereshit 39:7 ("שִׁכְבָה עִמִּי"), or Tehillim 17:1 ("שִׁמְעָה י"י צֶדֶק").
3. so and so | פְּלֹנִי אַלְמֹנִי – The phrase "פְּלֹנִי אַלְמֹנִי" is a way of referring to a person or place without naming it, equivalent to saying "such and such" or "so and so" (see Shemuel I 21:3 and Melakhim II 6:8). R"Y Kara suggests that "פְּלֹנִי" relates to the root "פלא", to be wondrous or unknown, as per its usage in Devarim 17:8 ("כִּי יִפָּלֵא מִמְּךָ דָבָר") or Shofetim 13:18 ("לָמָּה זֶּה תִּשְׁאַל לִשְׁמִי וְהוּא פֶלִאי"), while "אַלְמֹנִי" relates to the root "אלם", mute, referring to something which is not spoken. It is likely that Boaz spoke to the man using his real name, but the text has not preserved it either because it is not significant to the reader (Pseudo-Rashi), or so as to denigrate the man for refusing to redeem Rut (Rashi). Since he will refuse to "establish the name of the deceased", he himself is not named.