Hungarian Historical Phonology alom
alom 'Unterstreu'
First attestation/Old Hungarian data
[coming]
Important dialectal forms
alam, widely found in dialects (see ÚMTSz I: 207, s.v. alom)
Uralic/Ugric/Pre-Hungarian reconstruction
PUg *e̮lama
UEW: PUg *ala-ma (alɜ-mɜ) 'padding in shoes (made of hay), bed of straw; Einlage im Schuh (aus Heu), Unterstreu'
Status of the Ugric etymology
Convincing
Loan etymology
None suggested
Cognates suggested in earlier research
Khanty: East (Trj) i̮ʌəm 'Einlage im Schuh (aus festem Heu), Brandsohle', South (DN) itəm, North (Kaz) ĭʌəm 'Einlage im Schuh (aus Heu Filz)' < PKh *i̮ʌəm
Commentary
The Ugric etymology is regular: both Hu a and Khanty *i̮ correspond regularly in Uralic *e̮ - a stems (see Zhivlov 2014: 124). It has been assumed (see UEW) that this word might be a derivative of Uralic *e̮la- 'down, under'. While this is semantically a plausible idea as such, it is not clear what is the denominal *mV suffix assumed by the UEW (it is not clear whether such a suffix can be reconstructed; a deverbal suffix *-mA can be reconstructed to Proto-Uralic but the evidence for a homonymous denominal noun suffix is scarce).
Conclusion
A convincing Ugric etymology.
References
UEW s.v. ala-ma (alɜ-mɜ): PUg Uralonet
(Zhivlov 2014)