import re
suffixes = r"(?:adj\.|adv\.|pron\.|num\.|num\.-m|conj\.|part\.|aux\.|prep\.|n\.|v\.|m\.)"
regex = fr'^(\w+?)((?:{suffixes}) .*)$'
for sentence in ['qiān\tnum. thousand', 'jiànm. (used for clothes among other items) piece']:
result = re.search(regex, sentence.replace('\t', 't'))
if result:
print(result.groups())
aW1wb3J0IHJlCnN1ZmZpeGVzID0gciIoPzphZGpcLnxhZHZcLnxwcm9uXC58bnVtXC58bnVtXC4tbXxjb25qXC58cGFydFwufGF1eFwufHByZXBcLnxuXC58dlwufG1cLikiCnJlZ2V4ID0gZnInXihcdys/KSgoPzp7c3VmZml4ZXN9KSAuKikkJwoKZm9yIHNlbnRlbmNlIGluIFsncWnEgW5cdG51bS4gdGhvdXNhbmQnLCAnamnDoG5tLiAodXNlZCBmb3IgY2xvdGhlcyBhbW9uZyBvdGhlciBpdGVtcykgcGllY2UnXToKICByZXN1bHQgPSByZS5zZWFyY2gocmVnZXgsIHNlbnRlbmNlLnJlcGxhY2UoJ1x0JywgJ3QnKSkKICBpZiByZXN1bHQ6CiAgCXByaW50KHJlc3VsdC5ncm91cHMoKSkK