He sat up after a few moments, and threw back his head, listening strainingly for outside sounds.
Source: wiktionary
Strainingly
Synonyms for "strainingly"
Ranked by relevance and common usage.
Sample sentences
2 total sentences available.
[…] as soul-deadeningly, eye-strainingly, sleep-inducingly boring as going through fourteen file boxes of sloppily photostatted bank records.
Source: wiktionary