The adjective comes from a conflation of several different terms:

• Middle English alich, alych, alyke, a Late Middle English development from earlier Middle English anlich, anlyke, from Old English onlīċ, anlīċ.
• The borrowed Old Norse - cognate of the same word, álíkr, ultimately yielding similar Late Middle English forms.
• Middle English ylich, ylych, ilich, ylik, ylike, ȝelic, from Old English ġelīċ, from Proto-West Germanic *galīk, from Proto-Germanic *galīkaz.

  Similarly, the adverb also comes from a conflation of several different terms:

• Middle English aliche, alyche, alyke, a Late Middle English development from earlier Middle English anliche, anlyke, from Old English onlīċe, anlīċe.
• Additionally Middle English oliche, olike, ultimately from the Old Norse - cognate of the same word, álíka.
• Middle English yliche, ylyche, iliche, ylike, ȝelice, from Old English ġelīċe.

• (British, America) IPA: /əˈlaɪk/

alike

1. Having resemblance or similitude; similar; without difference.

   The twins were alike.

• French: semblable, pareil, analogue
• German: gleich
• Italian: simile
• Portuguese: parecido, semelhante, similar, afim
• Russian: одина́ковый
• Spanish: igual, semejante, parecido

alike

1. In the same manner, form, or degree; in common; equally.

   We are all alike concerned in religion.

   • 1820, [Walter Scott], chapter III, in The Abbot. […], volume I, Edinburgh: […] [James Ballantyne & Co.] for Longman, Hurst, Rees, Orme, and Brown, […]; and for Archibald Constable and Company, and John Ballantyne, […], →OCLC ↗, page 73 ↗:

     As the Knight himself seemed tacitly to disclaim alike interest and controul over the immediate favourite of his lady, young Roland was, by circumstances, exempted from the strict discipline to which, as the retainer of a Scottish man of rank, he would otherwise have been subjected, according to all the rigour of the age.

   • 1910, Emerson Hough, chapter II, in The Purchase Price: Or The Cause of Compromise, Indianapolis, Ind.: The Bobbs-Merrill Company, →OCLC ↗:

     Carried somehow, somewhither, for some reason, on these surging floods, were these travelers, of errand not wholly obvious to their fellows, yet of such sort as to call into query alike the nature of their errand and their own relations.

• French: pareillement
• German: gleichermaßen, gleich
• Italian: similmente, ugualmente
• Portuguese: igualmente, similarmente
• Russian: одина́ково
• Spanish: igualmente