Strong's #834: 'aher (pronounced ash-er')
 a primitive relative pronoun (of every gender and number); who, which, what, that; also (as an adverb and a conjunction) when, where, how, because, in order that, etc.:--X after, X alike, as (soon as), because, X every, for, + forasmuch, + from whence, + how(-soever), X if, (so) that ((thing) which, wherein), X though, + until, + whatsoever, when, where (+ -as, -in, -of, -on, -soever, -with), which, whilst, + whither(- soever), who(-m, -soever, -se). As it is indeclinable, it is often accompanied by the personal pronoun expletively, used to show the connection.
Brown-Driver-Briggs Hebrew Lexicon:
 ׁ 
  'ăsher 
 
 1) (relative participle)
 
 1a) which, who
 1b) that which
 
 2) (conjunction)
 
 2a) that (in object clause)
 2b) when
 2c) since
 2d) as
 2e) conditional if
 
  Part of Speech: relative particle
 
 conjunction
 
Relation: a primitive relative pronoun (of every gender and number)
Usage:
This word is used 5448 times:
1 Kings 1:49: "And all the guests  that were with Adonijah were afraid, and rose up, every man"
1 Kings 2:3: "that thou mayest prosper in all  that thou doest, and whithersoever"
1 Kings 2:3: "in all that thou doest, and whithersoever  and whithersoever thou turnest"
1 Kings 2:4: "may continue his word  which concerning me, saying, If"
1 Kings 2:5: "thou knowest also  what Joab of Zeruiah did"
1 Kings 2:5: "of Zeruiah did  to me, and what he did to the two captains of the hosts"
1 Kings 2:5: "the blood of war upon his girdle  that was about his loins, and in his shoes that were on his feet."
1 Kings 2:5: "that was about his loins, and in his shoes  that were on his feet."
1 Kings 2:9: "art a wise man,  what thou oughtest to do unto him; but his hoar head"
1 Kings 2:11: "And the days  that David reigned over Israel years:"
1 Kings 2:24: "Now therefore, as the LORD liveth,  which hath established me, and set the throne"
1 Kings 2:24: "the throne of David my father,  and who hath made me a house, as he promised,"
1 Kings 2:24: "and who hath made me a house,  as he promised, Adonijah shall be put to death this day."
1 Kings 2:26: "and because thou hast been afflicted in all  wherein my father was afflicted."
1 Kings 2:27: "that he might fulfill the word of the LORD,  which he spoke concerning the house"
1 Kings 2:31: "And the king said unto him, Do  as he hath said, and fall him; that thou mayest take away"
1 Kings 2:31: "him; that thou mayest take away the innocent blood,  which Joab shed, from"
1 Kings 2:32: "his blood upon his own head,  who fell upon two men more righteous"
1 Kings 2:38: "unto the king, The saying is good:  as the king hath said, so"
1 Kings 2:43: "the oath of the LORD,  that I have charged thee"
1 Kings 2:44: "all the wickedness  which thine heart is privy to, that thou didst"
1 Kings 2:44: "which thine heart is privy to,  that thou didst to David my father: therefore the LORD"
1 Kings 3:6: "my father great mercy,  according as he walked before thee in truth, and in righteousness,"
1 Kings 3:8: "And thy servant is in the midst of thy people  which thou hast chosen, a great that"
1 Kings 3:8: "thou hast chosen, a great  that cannot be numbered nor counted"
1 Kings 3:11: "And God said unto him, Because  him, Because thou hast asked"
1 Kings 3:12: "thee a wise heart;  so that there was none like thee before"
1 Kings 3:13: "And I have also given  thee that which thou hast not asked, both and"
1 Kings 3:13: "and honor:  so that there shall not be any among the kings"
1 Kings 3:14: "to keep my statutes and my commandments,  as thy father David did walk, then I will lengthen"
1 Kings 3:19: "child died in the night;  because"
1 Kings 3:21: "but when I had considered behold, it was not my son,  which I did bear."
1 Kings 3:26: "Then spoke the woman  whose the living child was unto for"
1 Kings 3:28: "heard of the judgment  which had judged; and they feared"
1 Kings 4:2: "And these were the princes  which he had; Azariah the son of Zadok"
1 Kings 4:12: "and Megiddo, and all  which is by Zartanah beneath"
1 Kings 4:13: "of Jair the son of Manasseh,  which are in Gilead; to him also pertained the region of Argob, which"
1 Kings 4:13: "are in Gilead; to him also pertained the region of Argob,  which is in Bashan, threescore great cities"
1 Kings 4:19: "of Bashan; and he was the only officer  which was in the land."
1 Kings 4:20: "and Israel were many, as the sand  which is by in multitude, eating"
1 Kings 4:28: "brought they unto  where the officers were, every man according to his charge."
1 Kings 4:29: "and largeness of heart, even as the sand  that is on the sea shore."
1 Kings 4:33: "trees, from the cedar tree  that even unto the hyssop that"
1 Kings 4:33: "even unto the hyssop  that springeth out of the wall: he spoke also of"
1 Kings 4:34: "from all kings of the earth,  which had heard of"
1 Kings 5:3: "his God for the wars  which were about him on every side, until the LORD"
1 Kings 5:5: "unto the name of the LORD  as the LORD spoke unto David"
1 Kings 5:5: "my father, saying, Thy son,  whom I will set upon thy throne in thy room,"
1 Kings 5:6: "hire for thy servants according to all  that thou shalt appoint: for thou knowest"
1 Kings 5:7: "Blessed be the LORD this day,  which hath given unto David a wise son"