Syriac Abbreviation Mark

Here is a TikZ method:

\documentclass{article}
\usepackage{tikz}
\usepackage{xspace}
\tikzstyle{zwj}=[inner sep=0pt,outer sep=0pt,anchor=base]
\tikzstyle{zwjdot}=[circle,draw,fill,inner sep=0pt,outer sep=0pt,minimum width=1pt]
\newcommand{\zwj}[1]{%
   \tikz[baseline]{
      \node[zwj] (text) {#1};
      \useasboundingbox (text.base west) rectangle (text.north east);
      \draw ([yshift=2ex]text.base west) -- ([yshift=2ex]text.base east)
         node[pos=0,zwjdot] {}
         node[pos=1,zwjdot] {}
         node[pos=0.5,zwjdot] {};
   }%
}
\begin{document}

\begin{tabular}{ll}
foobar         & puckluck \\
\zwj{foo}bar   & \zwj{puck}luck
\end{tabular}
\end{document}

At this point the descenders are changing the vertical alignment. I'll try more later.

It's implemented in the font now (per Werner's question).

Random unicode input, compiled with xelatex.

MWE:

\documentclass[12pt]{article}
\usepackage{xcolor}
\pagecolor{red!3}

\usepackage{polyglossia}
%Options:
%‣ numerals = western (i.e., 1234567890), eastern (for which the Oriental Arabic
%numerals are used: ١٢٣٤٥٦٧٨٩٠), or abjad.  .
%v1.0.1
%Commands:
%\abjadsyriac ‣ \abjadsyriac (see section 9)
%\aemph ‣ \aemph (see section 6.1).

\setdefaultlanguage[numerals=abjad]{syriac}
\setotherlanguage{english}

\newfontfamily\fgfontc[Scale=2.3,Script=Syriac,Colour=green]{Noto Sans Syriac Eastern}
\newfontfamily\fgfontck[Scale=2.3,Script=Syriac,Colour=blue]{Noto Sans Syriac Eastern}\newfontfamily\fgfontd[Scale=4.5,Script=Syriac,Colour=red]{Noto Sans Syriac Eastern}
\newfontfamily\fgfontdk[Scale=4.5,Script=Syriac,Colour=blue]{Noto Sans Syriac Eastern}

\setmainfont{Noto Sans Syriac Eastern}
\newfontfamily\englishfont{Noto Serif}

\begin{document}

\pagestyle{empty}

\begin{center}


\begin{english}
Syriac font,
with \textbackslash kern and \textbackslash llap commands. 
\end{english}

\fgfontc ܞ܏ܞܭܬܩܨܧܦܗܡܠܡܐ\kern-1.25pt\llap{\fgfontck ܞ܏ܞܭܬܩܨܧܦܗܡܠܡܐ}

܏ܘܗܖ܏ܛܚܙ܏ܩ܏ܨܧ܏܏܏ܤ

\fgfontd  ܞ܏ܞܭܬܩܨܧܦܗܡܠܡܐ\kern-1.45pt\llap{\fgfontdk ܞ܏ܞܭܬܩܨܧܦܗܡܠܡܐ}

\end{center}

\begin{english}
Syriac font, regular and bold:
\end{english}


ܞ܏ܞܭܬܩܨܧ ܦܗܡܠܡܐ

\bfseries
ܞ܏ܞܭܬܩܨܧ ܦܗܡܠܡܐ 

\mdseries\Large
ܞ܏ܞܭܬܩܨܧܦܗܡܠܡܐ 

\bfseries
ܞܭܬܩ܏ܨܧ܏ܦܗܡܠܡܐ 
܏ܘܗܖ܏ܛܚܙ܏ܩܨܧܤ

\end{document}