WHOLE CHARACTER
识shí, zhì
to know; to recognize (认识, 识别); knowledge (知识); insight; judgment (见识)
识 is to know and recognize; in 知识 it becomes knowledge.
ZDIC: 形声, but the extracted fragment omits the sound piece. Graph history gives the traditional 識 its sound side as 戠, simplified to 只 — so no sound rule is taught.
MEANING (SPEECH, WORDS)
讠yán
speech (from 言)
The simplified speech form; not a standalone page.
In 识: meaning (speech, words) ZDIC names the speech side as the meaning piece.
RIGHT-SIDE PIECE AFTER SIMPLIFICATION
只zhǐ; zhī
only; a measure for one of a pair (zhī)
A standalone character; in 识 it is the post-simplification piece, not the old sound side 戠.
In 识: right-side piece after simplification The traditional 識 used 戠 as its sound side; the simplified 只 is a different piece and is not treated as the old sound side.