How to make out the composition of the word "glass"?
Graduation: no or zero (we were told so at school when a word is without an end). For example, if "cups", then the ending will be "and".
Base: cup (base is all parts except the end)
The masculine noun Glass refers to the second declension and therefore has a zero ending: Glass-Glass-Glass-Glass-Glass.
The one-root words are: Glass-Glass-Settle-Cup-holder-Glass.
Therefore, the root of the word will be the morpheme GLASS-.
Next, select the diminutive suffix -CHIK as part of the word.
We get: GLASS-CHIK_ (root-suffix-zero ending), the base of the word: GLASS.