to try to find; to seek; to search for; to call on someone; to ask for

platform; stage; terrace; high and flat building or structure

(bound form) steps; stairs; a structure made of brick or stone for climbing up or down, as in 台阶 tái​jiē

A suffix attached to a word to form a retroflex ending, often indicating a small size, a sense of familiarity, or turning a word into a noun.