1. 痛苦：playing member 参加比赛的队员 | painfulness 痛苦 | staff catching apparatus 路签接受机

2. 痛/痛苦/可怜：painfully /痛苦地/苦恼地/费力地/ | painfulness /痛/痛苦/可怜/ | painite /硅硼钙铝石/

noun

1. the quality of being painful

e.g. she feared the painfulness of childbirth

Synonym: distressingness

2. emotional distress
a fundamental feeling that people try to avoid

e.g. the pain of loneliness

Synonym: pain