What is "Tafel"?
Rashi: It is something [bland] that needs salt (Shabbos 128a).
Why did he say "ha'Ye'achel Tafel mi'Beli Melach"?
Rashi: Ibn Ezra (5): You say words without substance, like eating [meat] without salt.
Devar Eliyahu: This addresses Elifaz' charge that all Hashem's ways are just. His ways are like a Chok (statute) - it can be fixed, but now it is Tafel, and not fixed.
What is "Chalamos"?
Rashi: It is something sharp that increases saliva, like garlic.
Rashi: Some say that it is an expression of Chalom 1 (a dream).
Ibn Ezra: This is like Chelmon (the yoke), which is inside.
Ibn Ezra: Some say that it is sap of a vegetable.
Devar Eliyahu: It is something without any taste at all. It cannot be fixed, unlike Tafel, which can be fixed via adding salt.
Rashi: I disagree, due to the Dagesh in the Lamed.
What is the meaning of "Im Yesh Ta'am b'Rir Chalamos"?
Rashi: Saliva that comes due to something Chalamos - does it have taste?! Do you think that I will accept your replies without substance?!
Devar Eliyahu: This addresses Elifaz' rebuke 'why do you scream?' These afflictions are like Chalamos - they cannot be fixed at all. Even after I will understand that they came justifiably, this is not a bandage that will stop me from screaming due to the great pain. Nature dictates [that one must scream amidst such pain 1 ]!
The first seven days, he did not scream (2:13)! (PF)


