着たら

if/when (someone) puts on

→ 着る

着 wear, put on + たら Conditional (“if/when”)

verb · informal Rare #45,313

if/when (someone) puts on Used with clothing worn on the upper body, such as a shirt or coat.

JA: コートを着たら、外に出よう。

EN: Once you put on your coat, let’s go outside.

Conjugation of 着る

Conditional

着たら

Once I get dressed, I'll kill that bastard.

— 続・夕陽のガンマン (1966)

Why don't you put something on?

— ふたりのベロニカ (1991)

If I put on this uniform

— キャッチ・ミー・イフ・ユー・キャン (2002)

Because I’ll open it once I’m dressed.

— 続・夕陽のガンマン (1966)