\documentclass{standalone}
\usepackage{tikz}
\usetikzlibrary{arrows}
\usepackage{fontspec}
    \setmainfont{Charis SIL}
\begin{document}
% In the preamble:

\begin{tikzpicture}
  \draw [->, dashed] (-0.35,0.25) node [] {} -- (-0.35,5) node[midway,above,sloped] (TextNode) {\tiny Increasing Sonority};
   \draw [very thick,dotted] (0,0) node[anchor=north]{Onset} -- (4,5) node[anchor=north]{} -- (8,0) node[anchor=north]{Coda};
  \draw (4,0) node[anchor=north]{Nucleus};
  \draw [very thick,color=blue] (0,0) node[anchor=south]{\large k} -- (2,3) node[anchor=south]{\large m} -- (4,5) node[anchor=south]{\large a}  -- (6,4) node[anchor=south]{\large l} -- (8,0) node[anchor=south]{\large p};

\end{tikzpicture}

\end{document}
